Computer Help forum


Constant c000021a Error

by Mortro / January 1, 2013 2:32 AM PST

Recently, my computer decides to shut off at completely random times. When I turn it back on after it shuts down by itself, it displays a c000021a error after the logo load (doesn't matter if I try to boot into Safe Mode or not). But when I reboot it again, everything runs smoothly and I get no significant problems whatsoever until the next time it decides to crash out on me. The times when the computer crashes are completely random; it may happen once every other day, at other times it shuts off multiple times a day. It's honestly frustrating to lose work whenever it shuts down and all the things I've been trying to get it fixed for good doesn't seem to work at all.

I've tried using Last Known Good Configuration, but it never solved anything. I tried to use Windows Repair multiple times; sometimes it finds the error and "repairs" it, other times it detects nothing at all. I have no recent System Restore points so I can't go back to when this problem never existed if I wanted to. I tried uninstalling any recent installs that might've triggered the issue but nothing worked. I'm not sure if it's the work of viruses, but I tried scanning my computer with anti-malware programs like AVG and Malwarebytes just in case but nothing came up.

Is it even possible to get rid of this nuisance without having to reformat my computer?

Here are my specs for reference:

Windows 7 Home Premium 32-bit SP1
Intel Core2 Quad CPU @2.40GHZ, 4GB RAM, NVIDIA GeForce 7350 LE

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The machine looks a little old.
by R. Proffitt Forum moderator / January 1, 2013 2:35 AM PST

Did you try it with the cover off and have you cleaned the insides recently and one last question. Did you replace the heatsink compound on all heatsinks?

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by Mortro / January 1, 2013 2:44 AM PST

I actually did clean everything out a few days ago to see if the BSOD would stop coming up. I didn't try it with the cover off and I never replaced any heatsink compounds or anything for that matter.

One thing to mention is that whenever these errors occur I'm on Mozilla Firefox or having it run in the background (Firefox 17.0.1 to be specific). I tried clearing it out of my computer and reinstalling it before, but I never really assumed that it was the causing the problem since I was using it for months before this problem started happening.

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The quad core looks old enough
by R. Proffitt Forum moderator / January 1, 2013 2:57 AM PST
In reply to: Yeah.

To need the usual work and fresh compound.

ABOUT FIREFOX. You didn't tell much but did you DISABLE FLASH ACCELERATION?

It's a common issue.

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Why the 32 bit OS?
by R. Proffitt Forum moderator / January 1, 2013 2:58 AM PST

The CPU and such should be good to go. And it avoids some out of memory failures too.

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