The installation went very smoothly. I installed with no problems with Windows 7 Firewall, AIS, Prevx all running. Only thing I noticed was that 3 updates didn’t happen, but they were probably superseded by the service pack, since after reboot they were not prompted for reinstall. No problems until the sudden BSOD, which hasn’t reoccurred since SafeZone died. http://forum.avast.com/index.php?topic=71848.0.