I just uninstalled 2.7 from win2000 machine when the licence expired, but the 3.0.672 installer wouldn't run. I contacted support and they told me to run sysinspector and they told me that the available memory was too low, and to uninstall/disable all other security, anti-malware app's before trying the installer. This worked and v3.0.672.0 is installed, but it freezes windows during every scan. It also freezes when I try to 'disable antivirus and antispyware protection'. Windows has crashed on a few other random occasions as well. I've also tried add/remove progs to uninstall a whole load of unused app's to free up space. So what else can I do? I haven't been able to do a single scan since installing.