JSI Tip 3645. Backdoor.NTHack virus causes STOP 0x0000001e KMODE_EXCEPTION_NOT_HANDLED in win2k.sys.

Microsoft Knowledge Base Article 294728 contains the following description:

When you restart your computer, you may receive the following error message: STOP 0x0000001e KMODE_EXCEPTION_NOT_HANDLED in win32k.sys or STOP 0xC000021A \{Fatal System Error\} The Windows Logon Process terminated unexpectedly. This behavior can...