Boot loop problem. BSOD c000021a Fatal System Error. Please help

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rockitout

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Oct 16, 2011
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I have a custom built computer. Windows 7 64 bit, 8 Gigs Ram. As of two days ago I can't boot into windows. I get to the colored windows logo then it restarts. Same thing in safe mode. I tried a system repair and it fails each time. Tried last known configuration and that didn't work either. I'm running out of ideas. The BSOD reads:

Stop: c000021a {fatal system error}
The verification of a knowndll failed. system process terminated unexpectedly with a status of 0x000012f (0x0090d890 0x00000000).
The system has been shut down.
 
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