I'm using ZA Extreme Security Version 9.1.008.000 with Vista Ultimate. For the last ten days, my system has crashed and displayed the "blue screen of death" once or twice a day. It doesn't seem to relate to any particular activity, and even happens when the PC has been idle for a while. I have not installed any new hardware or software for months, so that should not be an issue. The Microsoft "solution" says the problem is likely related to the antivirus and firewall programs. Could this be a ZA problem? Any other ideas?