One day I encountered an unusual problem with my Dell Dimension 2350 (which has Windows XP Home Edition.) Here's what happened, first I got a blue screen. Then, here's what it read; STOP: c000021a {Fatal System Error} The Windows login process system process terminated unexpectedly with a status of 0x0000005 (0x00000000 0x00000000) The system has been shut down. If you have any input on this issue, please post as soon as possible. Thank You. 