Fix an Unbootable Windows XP PC.
If Windows XP does not start, and you receive one of those lovely Blue Screens (also known as BSOD - Blue Screen of Death), then you will definitely want to pay attention to this guide because it could be your saving grace. This fix has saved me from a reformat and reinstall so many times. It has also been used by many of my Readers who send in questions. I have sent these exact instructions out less images many times.
The fix is to repair the ntldr (the ntldr is the boot loader) and the ntdetect.com (the ntdetect.com is responsible for detecting basic hardware)
To do this fix you will need a Windows XP CD.
Stick the Windows XP CD in, and boot your computer from the CD.
Once you have booted up, you will see a Blue Screen like this:
Hit R, To go into the Recovery Console. You will have to type in the Admin password (If you donít recall setting a password for the Admin, try leaving it blank then hit enter, if you get an error, that means that there was a password. You will need this password to continue)
Once in the recovery console, type the following (note my CD Drive is letter D: so change this to whatever your CD Drive is and my Windows is on C: so change that drive to whatever your Windows is on):
copy D:/i386/ntldr C:
copy D:/i386/ntdetect.com C:
Next type: fixboot
Then type: fixmbr
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