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.