C000021a Blue Screen Error
The c000021a blue screen error is displayed when Windows loads or shuts down. This error is caused by a failure to load an essential Windows component which is required in the login process of your PC. Using a Windows NT, Windows Server 2003 or Windows XP computer will show this error on a blue screen like the one detailed above.
The error that is displayed is typically like this:
STOP: c000021a {Fatal System Error}
The Windows Logon Process system process terminated unexpectedly with a status of 0xc0000034 (0×00000000 0×0000000)
The system has been shutdown.
