Fix An Unbootable XP with Last Known Good Configuration.
If your computer does not boot into Windows
Properly, there exists an easy option to fix the problem at your
disposal. Using the Windows Advanced Options Menu
to boot from the Last Known Good Configuration.
Every time you boot successfully, Windows XP records your
registry keys and device drivers. The Last Known Good
Configuration option in the Windows Advanced
Options Menu tells Windows XP to load up the last
successful boot registry and device drivers
How do I boot Windows XP so that it uses
the Last Known Good Configuration?
Answer – Follow the below procedure
Getting to the Last Known Good
Configuration is easy. First, start your computer. As
soon as the BIOS has finished loading, begin tapping the
F8 key on your keyboard. Continue to do so until the
Windows Advanced Options menu appears.
Once the Windows Advanced Options
menu appears, select Last Known Good Configuration
If you begin tapping the F8
key too soon, some computers display a "keyboard error" message.
To resolve this, restart the computer and try again.
Other options (if Last Known Good
Configuration does not work).
Try using System Restore To access System
Restore, first boot into Safe Mode by
tapping the F8 key on your keyboard. Continue to
do so until the Windows Advanced Options menu
appears. Then selecting Safe Mode
Once Safe Mode has loaded.
Go to System Restore (Click Start, then All
Programs, then Accessories, then System Tools, Then System
Restore). Once in System Restore choose a restore point
to Restore your computer.
If there are no restore points or the restore
fails, then try to repair your boot sector
If that doesn’t work, as a last resort, do a
Repair Install of XP.