How can i solve this problem

Hi dear, There are a problem in my Windows system. I need to help solve this problem. I see this error message on Windows system.
"STOP: c000021a {Fatal system error} The verification of a knownDLL failed.system process term the statue of 0*c000012f (0*00112560 0*00000000). The system has been shut down".
How can I fix this problem? Please help me to solve this problem. Thank you

