Uninstall Super AntiSpyware. Uninstall Avast, too. Use
Microsoft Security Essentials as your antivirus with windows inbuilt firewall, and
free MBAM as the on demand scanner.
Download and install those, and then run full system scans with both of them, one by one.
A device driver is not causing the crashes. Then, it comes the AV programs.
And, just asking, are you overclocking? If so, get back to default.