1. Restart your system to see if the operating system will load correctly. Depending on the type of error that was encountered, you should be able to restart your system and load the operating system.
2. Undo the last action that you did before the error occurred. If you installed a new program, go to the Control Panel and remove it under Add or Remove Windows Components. Reboot your system, and use it normally to see if the blue screen error occurs again.

3. Restart your computer using the last known good configuration option. When your computer has been restarted, press the F8 key multiple times when the computer boots up. This will display the Windows Advanced Options menu. Tab down to Last Known Good Configuration, and press Enter.
4. Run a registry cleaner to remove old and unneeded entries from the registry. You can use a program such as CCleaner or RegSeeker to clean up your registry (see Resources). Alternatively, you can use the Cleanup Center provided by Microsoft OneCare (see Resources).
5. Restore your system to a previous point before the blue screen error occurred using the Windows System Restore feature. You can access System Restore on Windows XP through the Start menu. Select Run, type 'Restore' and then click the 'OK' button. When the Restore window is displayed, double-click the rstrui.exe file. If you are running Windows Vista or Windows 7, go to the Start menu and type 'rstrui' in the search box and press the 'Enter' key.