can't remove old quicktime

Microsoft 3pk winxp home/plus! dme sp2 e...
July 11, 2011 at 00:55:16
Specs: Windows XP pro, dual core2.8GH/ Max XP
Trying to install itunes for an iphone access to store.

The installation program stops, aborts, when it comes to the install quicktime sequence. Message 'can't remove previous old quicktime.

At the moment I have scoured the computer using regedit, to get rid of reg entries that mention quicktime.

Any ideas as how to install itunes, or a workaround?

Bye and thanks
Fred


See More: cant remove old quicktime

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#1
July 11, 2011 at 20:12:52
remove previous quicktime

http://qurl.com/msz19

Maybe this way.

http://support.apple.com/kb/ht1925


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#2
July 11, 2011 at 21:19:51
"At the moment I have scoured the computer using regedit, to get rid of reg entries that mention quicktime."

That's a last resort, unless you're an expert and you know exactly what you're doing.
Johnw's fixes or similar may not work because you did that. You may need to load a previous System Restore restore point to restore what you removed.
......

This may not work either unless you load a previous restore point.

Download this, install it, and run it .

Windows Installer Cleanup Utility
http://majorgeeks.com/download.php?...

Many programs are installed by Windows Installer software packages. If QuickTime was installed with one, it should be listed in the programs the Windows Installer Cleanup Utility finds.If it is, delete it's entry, and the Windows Installer Cleanup Utility will remove registry entries that made QuckTime work, and hopefully also remove whatever the iTunes installation programs is detecting, if that's where it's detecting something.

You may also need to delete QuickTime files from somewhere in Program Files

NOTE - DO NOT use the Windows Installer Cleanup Utility to Remove Microsoft Office 2007 or later or any of Ir's component programs, Microsoft is no longer offering it as a download because of problems using the Windows Installer Cleanup Utility to remove those, Otherwise, it's an excellent utility.
....
The default iTunes download has QuickTime included, There is probably a different download if you don't want to install QuickTime, or you may be able to choose to NOT install QuickTime when you use the default combo download..
There are other programs that can play QuckTime files.


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#3
July 12, 2011 at 05:47:50
Dear Guru, I'm trying to follow and implement the steps you suggest....

XP system restored to 1 june 2011 ( before getting into the iphone mess.

So step by step .. starting with installing itunes
ºººººººººººººººººººººººººººººººººººººººººººººººººººººº
Itunes cant install,
errr message = can't run ...some required files are missing,
please reinstall itunes
iDownloaded from Apple site
itunesSetup v10.2.1.1 date 25March2011
Monitored installation with ashampoo uninstaller program
2 options repair or eliminate.
I chose eliminate.
After a few seconds got the same message above
'= can't run ...some required files are missing, '
but the process continued
Finally:Itunes ha sido uninstalled correctly
I was then asked to restart XP to implement changes. Did so.
itunesSetup v10.2.1.1 date 25March2011
This time no uninstall or repair choice.
I accepted all install suggestions, even language 'Spanish'
after 3 minutes got the enhorabuena ( congrats )message
correctly installed

start Itunes.exe
ºººººººººººººººº
New message: 'Windows closed the program iTunes of Apple.inc
to prevent data execution'
Then itune message.
itunes detects a problem and will close
I then tried opening itunes when not connected to the inteernet.
I got the same two, windows and itunes messages-


So looking at possible remidies on the internet for DEP

I found.-
If a program is failing and you want to disable DEP to see if that is the cause. Here are the steps. (Just disable DEP for the program in question… don’t disable it for your whole system.)

1. Click Start
2. Select Control Panel
3. Select System
4. Click the Advanced tab
5. In the Performance region select Settings
6. Click the Data Execute tab in the dialog box that opens
7. Select Turn on DEP for all programs and services except for those I select
8. Click Add.
9. The open dialog box will open. Browse and select your application.
10. Click Open
11. Click Apply
12. Click Ok
13. Reboot

Having done all of the 13 points...

Windows loads and on the desk top shows my choice of exclude itunes from DEP.

Unfortunately , the DEP window opens immediately after I click the itunes icon. It tells me
1. It closed the itunes program
2. Try and get a more modern version of itunes...

Not quite sure where to go from here.
Your serve plese...

Bye and thanks for taking interest in the problem
Fred


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#4
July 12, 2011 at 11:52:45
"Tags:
Microsoft 3pk winxp home/plus! dme sp2 ..."

Have you installed SP3 updates ?

If you haven't, most new, recent, or fairly recent program installations require them to be installed.
.......

NOTE that sometimes the resident module(s) of anti-malware programs - a part that runs all the time scanning for suspicious activity - will interfere with the proper installation of third party software, the software will not install properly, and you may get no indication of that at all while installing the software.
To avoid that possibilty, you should always DISABLE the resident module(s) of anti-malware programs, BEFORE you install third party software (software other than most Microsoft Updates, etc., that did not come with Windows ), especially when it's a major or complicated software package.
E.g. if you are using the free or paid version of AVG, you should disable the Resident Shield in AVG's 's settings in Windows.
If you don't know how to do that, tell us which anti-malware software you are using.
When you are sure the software has installed correctly, re-enable the resident module(s).
.......

"Itunes cant install,
errr message = can't run ...some required files are missing, "

"After a few seconds got the same message above
'= can't run ...some required files are missing, '"

Did it tell you which specific one(s) ?
If yes, did you copy down it's / their names ?

"New message: 'Windows closed the program iTunes of Apple.inc
to prevent data execution'
Then itune message.
itunes detects a problem and will close
I then tried opening itunes when not connected to the inteernet.
I got the same two, windows and itunes messages-"

Did you write down the messages ?

Do you have a third party (added on) software firewall installed, or a program that behaves like one ?
E.g.
- a standalone one - just a software firewall.
- one included with an anti-malware software suite of programs.
E.g.the paid or trial version of AVG has that.
- an anti-malware program that has firewall like features.
E.g. Spybot, AdAware.

If you DO, DISABLE the firewall or the resident module for it from running BEFORE you install third party software, to prevent it from possibly interfering with the proper installation of software.


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#5
July 12, 2011 at 23:25:21

Dear Tubesandwires, Sorry about reply delays but we seem to be in different time zones.

I was relieved to see you have offered another list of suggestions to get itunes up and running, I'll start with the most immediated, updating XP sp3.

If this is the cause,...I won't know for a couple of hours because I'm downloading whatever are the latest uSoft files.
.
I switched off the automatic update about six months ago because sometimes the PC goes into a sort of limbo until the downloads are incorporated. So if I disappear from the thread we know why..

Your points.:-
......
E.g. if you are using the free or paid version of AVG, you should disable the Resident Shield in AVG's 's settings in Windows.
......
I have free version.. I disactivated for 15 minutes. There was no change in the DEP sequence when I click on the itunes icon.
I get the following messages.

1. To help protect your equipment, windows closed this program.
2. itunes detected a problem and will close.

as for adaware and spybot, windows Ctrl+alt+del indicated that neither was present in the process list.

...Did it tell you which specific one(s) ?
If yes, did you copy down it's / their names ?...

The only information is that itunes is being closed (see above 1. and 2.)

....Do you have a third party (added on) software firewall installed, or a program that behaves like one ?....

No, I don't have any other firewall in my XP system that I know of.
I would add that I'm using the old AVG that d Some times that would make my PC really slow

So that leaves me to answer if itunes is accepted after I install the latest sp3 updates. I'm keeping my fingers crossed.

Bye and thanks
Fred


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#6
July 13, 2011 at 04:16:49
Dear Tubesandwires.
I have update SP3, there were 198 new entries., sadly when I click itunes, windows STILLjumps into the DEP routine. I did both DEP switch off options, for itunes alone or just DEP windows.
And after that windows also jumps into tee DEP routine. meaning the switch off DEP settings are being ignored.

So looks like we are at the end of the line in the sense each solution gives rise to a new problem :-)
I started with a quick time installation problem then itunes ... Both are now installed thanks to your efforts.

However trying to run quicktime gives a QT error, ...problem have to close (no DEP message) and itunes has two error messages windows DEp then itunes closing.

So, well many thanks but it looks like we are up a gum tree.

Bye and a million thanks for your time and effort.
Fred.

PS I'll go back to my LG. That connects to the internet. It has aradio. It accepts my 330 tunes from my PC. It has bluetooth and I believe wifi.

Lang may yer lum reek ( not politically correct in our times, but very concise.)


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#7
July 13, 2011 at 08:50:10
Dear Guru, you ideas are very logical. But after my experience with Pipes andwires I have come to the conclusion that it must be something entirely weird.
How weird? Well maybe some program in updating SP3 is not working properly, or, some program has a piece of code that windows sees as the DEP command...

But even so I tried the get rid of previous installations of quicktime and itunes then reinstall. Sadly this doesn't do anything that is differnt and I,m stuck in the dep routine being activated which stops itunes loading....

But thanks anyway

Fred


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#8
July 13, 2011 at 15:03:27
Thanks for the Thanks.

"Sorry about reply delays but we seem to be in different time zones."

I'm in western Canada, Mountain Standard time, on Daylight Savings time (+1 hour vs. the winter time).
The time of this US web site is Pacific Standard time, on Daylight Savings time, the next time zone to the west (one hour less than mine) .
(The time springs forward, falls back on the same days and times in the US and Canada.)

"but it looks like we are up a gum tree."

Are you in Australia or New Zealand ?
If yes, that's a lot of time zone difference.
We get a lot of people who start a Topic here who are from there, maybe more than from Canada, and there are or have been a few of us who regularly answer who are from there.

"I switched off the automatic update about six months ago because sometimes the PC goes into a sort of limbo until the downloads are incorporated."

That shouldn't be necessary unless your system is under performing for whatever reason.

What is the make and model of your computer ?

Is it using onboard - built into the mboard - video ?
( The max data transfer speed of the ram installed in the mboard is about half what it would be if you were using a video card in a slot when you're using onboard video.)

What CPU speed ?

How much ram ? (512mb or more, or on a slow computer 1gb or more, runs Windows much better.)

Does the partition Windows is installed on - usually that's C - have less than ~10% free space ?
(If it's too full Windows runs MUCH slower)

Most if not all updates that have been downloaded by Automatic Update are NOT installed until you click on Turn off when you Shut Down Windows

By default Automatic Update downloads updates whenever they're available, in the background, according to a time or times when it checks for them.
I often set that to non-default settings.
E.g. check for updates but do not download them - inform me when there are updates available -
That way YOU choose when Windows may slow down due to downloading them.
Some people do that to avoid installing brand new updates that may have bugs - when the icon shows up in the taskbar indicating updates are available, you can click on that and go to the web site and find the date each one was released. If there are bugs in an update, it's usually fixed or a new one is made to replace it by the time a week has gone by since it was released.

"Your points.:-
......
E.g. if you are using the free or paid version of AVG, you should disable the Resident Shield in AVG's 's settings in Windows.
......
I have free version.. I disactivated for 15 minutes. There was no change in the DEP sequence when I click on the itunes icon."

Disabling an anti-malware program's resident module AFTER the software you're having problems with has been installed isn't going to change the situation.

"NOTE that sometimes the resident module(s) of anti-malware programs - a part that runs all the time scanning for suspicious activity - will interfere with the proper installation of third party software, the software will not install properly, and you may get no indication of that at all while installing the software."

If you DID NOT disable the Resident Shield in AVG before you installed the software, you MAY need to uninstall the software, disable the Resident Shield, and install the software again.
The only for sure way to eliminate the possibility that the Resident Shield did cause a problem is to do that.

"as for adaware and spybot, windows Ctrl+alt+del indicated that neither was present in the process list."

Both of those, free or paid version, have a resident module.

You supposed to NEVER have more than one anti-malware program's resident module running that is for the same thing at the same time because they are likely to CLASH with each other and cause you problems.

When you're not installing software, either you disable the resident module(s) in all anti-malware programs except one, or you un-install all but one anti-malware program that has a resident module .

If you DO have them installed, they're listed in your All Programs list, they may be under the maker's title, and they're listed in Add or Remove Programs..

When you have AVG 2011 (AVG 10) installed you don't need either of them .

"...Do you have a third party (added on) software firewall installed, or a program that behaves like one ?....

No, I don't have any other firewall in my XP system that I know of."

Both AdAware and Spybot behave like a software firewall

"I would add that I'm using the old AVG that d Some times that would make my PC really slow"

All anti-malware programs slow down Windows, some a lot more than others.I find AVG does not slow down Windows as much as most others, and AVG 2011 (AVG 10) doesn't slow it down much more than AVG 9 does, and it provides more protection (anti-spyware and more is built in).

It won't be long until you can't update AVG 9 anymore.
Grisoft only supports each version for about 2 years.
........

It is VERY important that when you install SP3 updates that you DO NOT HAVE ANY resident modules of anti-malware software running BEFORE you install them, otherwise it's VERY likely that installing the SP3 updates will cause you problems that you didn't have before you installed them because of interference from one or more of those resident modules.
That's probably the number one reason for installing SP3 updates to cause you problems !

If you DID NOT disable ALL resident modules of anti-malware software from running BEFORE you installed the SP3 updates, then Un-install the SP3 updates in Addor Remove Programs, DISABLE that/those resident module(s), and install the SP3 updates again !

"but it looks like we are up a gum tree."

Did you try using the Windows Installer Cleanup Utility ? (See response 2)

By the way, it can't find programs that used a Windows Installer software package unless the software installation is still there - e.g. if you have already used the program's own Un-install in Add or Remove Programs or wherever it can't find it.
On the other hand, it will work for a program that used a Windows Installer software package if the program's own Un-install program won't work, and it does a much better job of removing entries from the Registry than most program's own Un-install programs do.


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#9
July 13, 2011 at 18:05:37
Dear tubesandwires, just a little bit of whimsy while I sort out your suggestions.
I'm in Madrid Spain and maybe the heat at this time of year was fogging my thoughts.
I'm pleased to announce, I found a work around to get itunes on line, I used my little compaq netbook
which has loaded into my iphone 650 songs.

Right, this kills various birds. I used the same setupitunes program.
If it works in the netbook, it should work as well in the PC.
Your query on my PC:- xp pro 5.1 service pack 3, build 2600 :- memory 3327 MB CPU intel dual core 2.66GHz.
I have three HDs, C 500GB, D 80GB and an external backup K Iomega 2TB
ºººººººººººººººººººººººººººººººººººººº

This maybe useless information but I rembered after the last serious virus attack a reinstall was needed, and curiously
It installed windows on the D disk. I didn't twig that this was so because all was working normally, albeit the 80GB is older and slower.
Eventually I installed XP again , this time on the C disk . All was faster but and had to rereference a whole host of programs.

At switch on, windows loads the bios then stops for a couple of seconds to ask do I want to use the C or D xp. If I don't touch any key, the program script selects the C disk XP..

I was curious then and I have tried chosing the D xp installation. But it gives a message, missing XP files. Meaning that when I got XP reinstalled on the C disk and removed the XP windows on the D disk what remains were left .

Meaning of this? Using explorer, the D disk contains no XP files.

Could this phantom XP be the cause of the strange behaviour .

Logically I should try and nuke the unwanted second XP option in the start menu just after the bios load, but here I'm out of my depth and wouln't even dare to meddle at this level and maybe wipe out my directory structure...

Pleas don't waste much time on what I have just said, unless of course you can see that this could be the cause.

Bye and sorry, groveling, if I have led you up the Gum tree.

My kindest regards, Fred


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#10
July 14, 2011 at 12:46:07
"I'm in Madrid Spain...."

Where are you from originally ?

There are zero gum trees outdoors in Canada as far as I know.

"memory 3327 MB CPU intel dual core 2.66GHz."

Those are certainly not performance limiting, even if you are using onboard video.

If you have 4gb of ram installed, you will probably be better off if you can install 3gb instead.

All versions of XP except XP Pro 64 bit are 32 bit operating systems.

The 4gb virtual memory address limit for 32 bit operating systems.
An example of 3gb working better than 4gb in a 32 bit operating system.

See Response 6:
http://www.computing.net/answers/ha...
....

A better explanation I've seen.

If you have a 32 bit operating system and you have installed 4gb in the mboard, the amount of that ram available to Windows and the user is
4gb minus the amount of ram your devices require or have.
E.g.
- minus the amount of ram shared with onboard video if you're using that
- and/or - minus the amount of ram your dedicated video card installed in a slot has.
If you have more than one video card installed in a slot,it would be minus the ram for all of them.
(and = Some mboard main chipsets have Hybrid video capability. If you have a PCI-E X16 video card installed in a mboard slot that is supported by that feature, it's often the default for both the onboard video and the video on the card to work at the same time, unless you change default bios Setup settings. In that case it would be minus the ram for both of them.)
- minus the amount of ram your sound adapter has, if that applies - e.g. sound cards installed in a mboard slot often have ram
- minus the amount of ram any other devices have,other than hard drives and optical drives,if that applies.
....

What percentage of the partition Windows is booting from (the drive letter of the one the Windows folder was installed on) is free space ?
....

"I have three HDs, C 500GB, D 80GB and an external backup K Iomega 2TB"

"This maybe useless information but I rembered after the last serious virus attack a reinstall was needed, and curiously
It installed windows on the D disk. I didn't twig that this was so because all was working normally, albeit the 80GB is older and slower.
Eventually I installed XP again , this time on the C disk ."

I NEVER install Windows from scratch unless I can't figure out how to get rid of the malware (most malware these days is NOT a virus).

It's usually very short sighted, or even DUMB, to install Windows from scratch if you don't need to - it takes less than an hour to run Setup, but that's only the FIRST step.It may take the equivalent in hours to DAYS to get your Windows installation and the personal data and programs you want to use back on the computer. Many people lose ALL their personal data that was on the partition Windows was on, unless they have copied the personal data on it they do not want to lose to elsewhere BEFORE they ran Setup. (If the hard drive itself is okay, you can do that even if Windows will not work normally, e.g. by booting the computer from a Linux CD.)

I always try to get rid of the malware FIRST, without doing that - if I don't know how toget rid of the particular malware , the info about and/or the specific program or programs I need that can do it is almost always easily found on the web.

However, the average person may not know enough or want to put in the time it might take to do that (or they're just impatient). They often spend MORE time getting their Windows installation back to where they want it to be.
....

All drive letters that are assigned in Windows, or in any operating system, are for logical drives, but the term logical is usually ommited when referring to them.
You can't treat the logical drive letter a physical drive has been assigned the same way as one for a partion on a drive unless the physical drive has only one partition.
The drive letters assigned to drive partitions (or any drive assigned C-Z) are not "written in stone".
You can change any drive letter that was assigned in Disk Management to any free (available) drive letter that's available, EXCEPT that you can't change the drive letter of the partition Windows isbooting from.

XP doesn't necessary assign C to the partition Windows was installed on.

XP's (and 2000's) Setup assigns the drive letter for the partition Windows itself is installed on according to whether or not Setup detects that one or more drive letters have already been assigned by 2000 and up to one or more drive partitions of (a) hard drive(s) Setupdetects when Setupis run.

If Setup detects no other partitions that have already been assigned drive letters,it uses C for the partition Windows is installed on.

If Setup DOES detect other drive partitions that have already been assigned drive letters,it uses the first free (available) drive letter alphabetically, NOT C, for the partition Windows is installed on.

If there ARE other drive partitions on hard drives that have already been assigned drive letters,BEFORE running Setup,if you disconnect all hard drives but the one you want to install Windows on, or if you use what is generically called a "partition manipulation" program to HIDE all other partitions on the same drive if it has more than one partition on it,then Setup will assign C to the partition Windows is installed on.

E.g. If you have two or more hard drives, and if it least one other hard drive has a partition Setup would detect as having already been assigned one or more drive letters, if the drive you want to install Windows on has only one partition,if you disconnect all other hard drives,then Setup will assign C to the partition Windows is installed on.

Also,the drive letter Setup assigns to the partition Windows is installed on can depend on how the drive is connected to the mboard, or it's jumper setting if it's IDE, or on what other devices are detected by Setup.

E.g.
I recently installed XP Pro from scratch on a hard drive that was the only hard drive connected when Setup was run. It was connected to the Primary IDE header, jumpered Slave, there was another drive on the same data cable, an optical (CD-RW) drive jumpered Master. The desktop case has a memory card reader that connects via one USB cable to a header on the mboard - four drive letters were assigned to it previously in Windows - one for each type or group of card types it could read.
When Setup was finished....
C, D, E, and F were assigned to the card reader.
G was assigned to the CD-RW drive.
H was assigned to the hard drive partition Windows was installed on.

I could have used Disk Management to change all those drive letter assignments EXCEPT the H for the hard drive partition Windows was installed on. (If a logical drive is using a drive letter you want to use for something else, you can change it's drive letter to any other free drive letter to free up that drive letter.)

I changed the drive jumper settings so the hard drive was Master,the CD-RW Slave, and unplugged the USB cable to the memory card reader,then I booted from the CD, deleted the existing data on the hard drive partition Windows had been installed in, and ran Setup again.
When Setup was finished....
C was assigned to the hard drive partition Windows was installed on.
D was assigned to the CD-RW drive
When I plugged in the USB cable to the card reader, it was assigned E, F, G, and H.

( I probably could have left the card reader plugged in while running Setup -the result would probably have been....
When Setup was finished....
C was assigned to the hard drive partition Windows was installed on.
D, E, F,and G was assigned to the card reader.
H was assigned to the CD-RW drive.
The drive letters for external drives, optical drives, and flash drives are normally assigned last, if they're all connected at the same time asthe hard drive(s). Windows retains whatever drive letter drive was assigned unless it has been unplugged and then Windxowswas booted without it being connected.)
......

"At switch on, windows loads the bios then stops for a couple of seconds to ask do I want to use the C or D xp. If I don't touch any key, the program script selects the C disk XP..

I was curious then and I have tried chosing the D xp installation. But it gives a message, missing XP files. Meaning that when I got XP reinstalled on the C disk and removed the XP windows on the D disk what remains were left .

Meaning of this? Using explorer, the D disk contains no XP files."

If XP's Setup detects an existing 2000 or up Windows installation on a hard drive partition, and if you DO NOT choose that partition to install Windows on from scratch (delete it's data or delete it's partition and make a new one),the the multiboot feature has been enabled after Setup has run and you have a choice of two or more Windows installations to boot from when you boot the computer.
Only one partition on all the hard drives connected to the computer can be made "Active" (bootable) at any one time - the 2000 and up multiboot menu allows you to choose which one. If you don't press any keys to select a Windows installation within xx (15 ?) seconds,the Windows installation last made, the top one, loads first by default.
If all the other Windows installations were working fine before you ran Setup,than you can choose any of them and it will work.

Removing the files you can see in Windows on an existing Windows installation does not remove the data that makes Setup detect it as bootable - you have to use Setup to delete the data on that partition before you actually run Setup itself.

If one or more selections of the multiboot menu do not work, you can
edit Boot.ini and delete the one that doesn't work.
If that results in there being only one Windows installation listed in Boot.ini, then you will not see the multiboot menu when you boot the computer anymore.

In your case...
Control Panel - System - Advanced - Startup and Recovery - Edit - you MUST maximize the window - delete the entire line(s) below the first line below [operating systems].
(The first line below [operating systems] is for the first operating choice when you boot)
..........

Another thing that drastically affect Window's speed.

Whenever you load Windows from a regular Windows CD (or DVD) from scratch, after Setup is finished you must load the drivers for the mboard, particularly the main chipset drivers, in order for Windows to have the proper drivers for and information about your mboard hardware, including it's AGP or PCI-E, ACPI, USB 2.0 if it has it, and hard drive controller support. If you have a generic system and have the CD that came with the mboard, all the necessary drivers are on it. If you load drivers from the web, brand name system builders and mboard makers often DO NOT have the main chipset drivers listed in the downloads for your model - in that case you must go to the maker of the main chipset's web site, get the drivers, and load them.

If the main chipset drivers have NOT been installed, at the very least...
- the Windows support for your USB 2.0 controllers will probably NOT be loaded
- your hard and optical drives will probably NOT be running in Windows as fast as they are capable of.
....

By the way..... the XP CDs have no built in SATA controller drivers.
They cannot recognize SATA drives by default (unless you load the needed drivers - see below a bit) unless the SATA controller mode in the bios Setup has been set to an IDE compatible mode of some sort.
In my experience, the bios of new and fairly recent mboards often have that SATA controller mode set to an IDE compatible mode of some sort by default, so that you don't have to fuss with having to load SATA controller drivers from a floppy disk in a conventional floppy drive after pressing F6 at the beginning of Setup.

If you want SATA drives to be able to achieve it's faster than the max 133mb/sec IDE max burst data transfer speed, the SATA controller drivers your mboard needs must be loaded in Windows,and .the bios must have the SATA controllers in SATA or AHCI mode.

If your bios still has the SATA controllers in an IDE compatble mode , the difference in perceived speed of the 80gb vs.the 500gb one if it's SATA is
- the 80gb drive, if its IDE, it may have a max burst speed of 100mb/sec, not 133mb/sec
- if both drives are SATA, both have a max burst speed in IDE compatible mode of 133mb/sec, but the 500gb drive has a larger onboard ram cache

When the bios has the drives in SATA or AHCI mode, the 80gb drive may have a 150mbyte/sec max burst speed , the 500gb drive 300mbyte/sec .

NOTE that new desktop SATA drives may have a tiny jumper installed on them that limits them to the 150mbyte/sec max burst speed. You must remove that jumper in order for the drive to have a 300gbyte/sec max burst speed in SATA or AHCI mode.
E.g. I have bought 3 new desktop Seagate 500gb SATA drives in the last two years or so and they all had that jumper installed.



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