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Saturday, 11 August 2012

How to FIx c00021a Fatal System Error" for Win 7, Vista, XP Logon Process

"c00021a Fatal System Error" for Windows 7/Vista/XP will cause the computer to shut down at random or freeze. However, users can restart your PC to the "Last Known Good Configuration".
Fix c00021a Fatal System Error for Win 7/Vista/XP Logon Process

1. Turn the computer on.

2. Press "F8" as the computer boots up.

3. Select the "Last Known Good Configuration" option and press "Enter".

5. Pick the operating system and press "Enter".

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