missing operating system on boot up

November 17, 2010 at 01:05:33
Specs: Windows 7, ore2 Duo & 4gig RAM
I have 3 HDD original was XP OS, then second HDD installed Vista, finally installed Windows 7 on a further drive. All operated ok and added to the boot up menu. I reformatted the XP drive by using the command prompt that un-mounted the drive.
When starting the system it came up with "Missing operating system". I have tried to select only one drive in various combinations without success. I have also tried booting with the windows CD and use their tolls without success. I have a feeling the problem could be in the boot.ini or manager file, but I have not been able to find it to try and edit it.
I think I have dug myself a big hole and need some enlightenment. Any suggestions?

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#1
November 17, 2010 at 01:46:27
Your MBR might be deleted or corrupt.
Try this sit to see how to recreate it
http://windows7themes.net/missing-o...
Then after you can download EasyBCD which will enable you to recreate a mult boot. Its free..


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#2
November 17, 2010 at 01:58:41
Thanks for the tip. There is only one problem, I cant boot up windows and will need to use the command prompt in the boot up screen.

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#3
November 17, 2010 at 02:52:56
" I have also tried booting with the windows CD and use their tolls without success"

Was the drive where XP was installed removed during the time you we running the Windows repair tool?


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#4
November 17, 2010 at 03:13:11
I did not run the windows repair tool. I just used the tools that were on the original Vista install disk. The disk with Win 7 was the only one connected at that time when I did this. I am now trying to install vista on the newly partitioned disk, with the aim to start windows and then edit the boot.ini. Not sure if this is going to work, Any other suggestions? Is there a way I can renew the boot.ini from the DOS prompt?

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#5
November 17, 2010 at 03:43:57
MBR needs to be on an active partition.
The Win XP HDD was the active partition
You can format a new HDD and make sure it has an active partition and try running the repair tool again.

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