When a Stop error occurs, Windows XP Professional displays a Stop message related to the problem, followed by one of these events:
If Windows XP Professional restarts your system immediately after a Stop message occurs, you might not be able to record Stop message information quickly enough. Disabling this default behavior is useful when you want to record Stop message details before using other recovery options such as Driver Rollback, System Restore, or Recovery Console. This information could help you analyze the root cause after you have addressed the symptoms of a problem.
To disable restarts when the system stops unexpectedly
If you cannot start your system in normal mode, you can also perform the preceding steps in safe mode.