I am running WindowsXP Media SP2: I recieved the STOP: c000021a fatal system error. The windows logon process system process terminated unexpectedly with a status of 0x0000005 (0x00000000 0x00000000). The system has been shut down. The system finally booted up after several attempts. I thought it might be a good idea to run Dr. Watson to see if possibly it will determine what is causing this issue, but i don't know how to run Dr. Watson. Can anyone shed any light on this error code or tell me how to run Dr. Watson. Thanks.