My laptop (Vista Home Premium, SP2) started crashing today. Other than email, nothing was downloaded or installed today and it was running fine overnight.

I finally noticed ZA (ZA Extreme Security was starting a scan just before it crashed. On the next reboot, I turned off the scheduled scan and initiated the scan myself and it crashed. Since re-booting from that crash,with no scheduled scan, the computer has run normally.

I noticed one post mentioned ZA doesn't play nice with other virus programs. I have Prevx (monitoring only) and SuperAntiSpyware running. They've been installed since August 29 (ZA since August 18).

Could one of these taken this long to cause a problem? If not, what else should I look at?