The following BSOD is related to a corrupted HIVE file. To fix this, boot into you OS using a boot disk such as ERD COMMANDER 2005. Once booted to the OS, copy, rename and replace the 4 HIVE files.
SAM
SECURITY
SOFTWARE
SYSTEM
THIS WILL DEFINATELY FIX THE BSOD DUE TO "STOP: c000021a"
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