Today,when i restart my computer.

A Stop c000021a message occur.i have tried to restart computer.After threes times later ,my computer restart nomally.howerev,it will be happened next restart.So,i use google .baidu and Microsoft to find the answer.

i have found the followed information.

http://www.microsoft.com/resources/documentation/Windows/XP/all/reskit/en-us/Default.