Solved Accidental deleted registry keys: Windows XP

August 10, 2011 at 03:27:10
Specs: Windows XP
Under systems folder I think I may have deleted several keys. Now, when I turn on my computer, the screen displays until the Windows loading page then it goes blank after. I tried safe mode, but when It reached the blue accounts page I could not move my cursor or even use the keyboard keys. Recently I do remember deleting several keys by accident. I didn't know that when I turned on my computer like this it would not respond.

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#1
August 10, 2011 at 03:35:43
✔ Best Answer
Try System Restore, I have had good results using in Normal or Safe Mode, different to Last Known Good Configuration in Safe Mode.
http://www.microsoft.com/windowsxp/...
http://bertk.mvps.org/index.html
http://bertk.mvps.org/html/safemode...
System Restore is accessed the following way:
1. It's a good practice to shut down all other applications before using System Restore, as it requires a full-system reboot to complete the installation. Connecting to the internet is not required, however. So shut all applications. Then click "Start."
2. Start > All Programs > Accessories > System Tools > System Restore. Then the program will load.
Or,
If System Restore doesn't work in Normal Mode, it might work in Safe Mode.
Toggle F8 or Press Ctrl ( depends on your comp ) during bootup ( just before, verifying DMI pool, message comes on )
Select Safe Mode.
http://support.microsoft.com/kb/315222
http://service1.symantec.com/SUPPOR...
http://support.microsoft.com/defaul...
http://www.microsoft.com/windowsxp/...
How to start the System Restore tool at a command prompt in Windows XP
http://support.microsoft.com/kb/304449



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#2
August 10, 2011 at 06:23:37
How do you delete keys by accident? You have to take several deliberate steps to be able to even access the registry (start > run > regedit), let alone delete registry entries once you're there.

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#3
August 10, 2011 at 13:17:09
If you didn't do what mickliq mentioned, you probably didn't delete registry keys.


"Now, when I turn on my computer, the screen displays until the Windows loading page then it goes blank after"

Did this happen after you loaded specific drivers for your video adapter ?
If yes, that's usually easy to fix, if by blank you mean black (no displayed image).


" I tried safe mode, but when It reached the blue accounts page I could not move my cursor or even use the keyboard keys."

Are the mouse and the keyboard both wireless ?
If yes, they may not work in Safe mode.


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#4
August 17, 2011 at 06:41:49
Well actually, I had to delete a registry key that has been tampering with my USB connections; but, during the initial deletion I think I have deleted the wrong one since most of the keys look really alike except for a letter or number. I do remember deleting 2 keys, one by accident because of misleading eyes, so I think that key somehow is related to system requirements in startup

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#5
August 17, 2011 at 06:47:18
@Tubesandwires
first, the video adapter and its drivers' are working just fine. and yes, after the windows it is black, but you can really see that the monitor is still turned on.

second, the mouse and keyboard are not wireless. I really don't trust wireless that much. I fixed and doubled check the connections and even cleaned them and still not a single change in setup.

@ALL: someone solved the problem by reformatting everything. the problem was that a registry key responsible for letting start-up run was missing. so yeah, I'm careless. thanks for the help anyways. I did lose ALL my files and I really want to know how to try and get them back but I guess thanks for all the help, I did consider all your suggestions :D


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#6
August 17, 2011 at 10:07:11
"the video adapter and its drivers' are working just fine."

All modern mboards, their bioses, video adapters, and operating system have support for displaying basic VGA video built into them.
The specific video drivers you have loaded in the operating system on the hard drive for your video adapter are not used while booting the computer - they're not loaded until AFTER Windows starts to load normally. They're not used in Safe mode or Enable VGA mode.

"Did this happen after you loaded specific drivers for your video adapter ?
If yes, that's usually easy to fix, if by blank you mean black (no displayed image). "

If that DID happen after you loaded specific drivers for your video adapter , sometimes the specific video drivers can't recognize your monitor properly and sometimes in that case you get no video at all after Windows starts to load. That's easy to fix - you load Windows in Enable VGA mode and set your monitor type to Plug and Play Monitor, or better still, load the specfic drivers for your monitor model, and you then WILL have video after Windows starts to load when you load Windows normally. (You can't do that in Safe mode.)
...........

You probably didn't need to load Windows from scratch.
It takes less than an hour to run it, but that's only the first step of many that you need to do.

E.g. You need to install the drivers/software for your mboard for devices that Setup did not find automatically, especially the main chipset drivers. You may need to install the drivers/software for other devices
Zillions of Windows Critical and Security updates need to be installed. Automatic Update will install most of those, but it can take a long time for it to finish doing that - they're only installed when you choose to Turn Off the computer. Using Windows Update many times on the Microsoft web site to do Express searches tl find and install them installs them in less time, but that takes at least several hours.
You may need to install SP3 updates - Automatic Update doesn't do that automatically.
You need to load a newer Internet Explorer and Flash Player version.
Etc., etc., etc. .

Okay, so your non wireless mouse and keyboard would not work in Safe mode.

In any case, you could have tried running a Repair installation of Windows procedure when you booted the computer from the Windows CD, rather than installing Windows from scratch - that does not delete your personal data you have added to the partition Windows is installed on.
E.g.
http://www.windowsreinstall.com/win...

It takes a little less time than running Setup from scratch, it can't fix all problems, but it's worth trying because if it's successful you won't need to do much to get Windows the way it was before and all your personal data is still there.

In any case, even if Windows will not work properly, you can boot the computer with something such as a bootabe Linux CD, and copy the personal data you don't want to lose to elsewhere, BEFORE you install Windows from scratch


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