Random BSODs, errors x50 and x3b

[Apex43]

I have been getting BSODs with errors x50 and x3b for the past few days. If anyone could help me resolve this I would be grateful. I can always attach my dump files. I also get BSODs when I shut down my PC and after I have been playing games for a long time (3hrs BF4)

 

[koolkat77]

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Avira contributes to BSOD's. Please remove it for testing purpose. Use Microsoft Security Essentials.

Recommended from a strict BSOD perspective, compatibility & stability compared to other security software:

Microsoft Security Essentials - Free Antivirus for Windows

Malwarebytes - Free

http://www.sevenforums.com/system-security/206705-good-free-system-security-combination.html

Run a System file check (SFC): http://www.sevenforums.com/tutorials/1538-sfc-scannow-command-system-file-checker.html

Install all updates including Service Pack One: Learn how to install Windows 7 Service Pack 1 (SP1)

Reduce items at start-up: http://www.sevenforums.com/tutorials/1401-startup-programs-change.html

Perform a clean boot: http://www.sevenforums.com/tutorial...ation-conflicts-performing-clean-startup.html

Scan with Kaspersky TDSSKiller:Anti-rootkit utility TDSSKiller

ESET online scanner: Free Online Virus Scanner | ESET

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Check for heating issues using Speccy or HWmonitor

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