Last Known Good Configuration

The Last Known Good Configuration feature is a recovery option that you can use to start your computer with the most recent settings that worked. The Last Known Good Configuration feature restores registry information and driver settings that were in effect the last time the computer started successfully. Use the Last Known Good Configuration feature when you cannot start Windows XP after you make a change to your computer, or when you suspect that a change that you just made may cause a problem. For example, you can use this feature if you cannot start Windows XP after you install a new driver for your video adapter, or if you installed an incorrect driver and have not yet restarted your computer.

When you start your computer by using the Last Known Good Configuration feature, Windows XP restores information in the following registry key:
HKEY_LOCAL_MACHINE\System\CurrentControlSet
Note Any changes that were made to other registry keys remain.

To start the computer using the last known good configuration perform the following steps:

1.
Print these instructions before continuing. They will not be available after you shut down your computer in step 2.
2.
Click Start, click Shut Down, and then, in the drop-down list, click Shut down.
3.
In the Shut Down Windows dialog box, click Restart, and then click OK.
4.
When you see the message Please select the operating system to start, press F8.
5.
Use the arrow keys to highlight Last Known Good Configuration, and then press ENTER.
6.
If you have a dual-boot or multiple-boot system, choose the installation that you need to access using the arrow keys, and then press ENTER.

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