Hi, folks: This is what has happened today. After upgrade Prevx2 to build 12 and during updating McAfee AS Enterprise's database, Za pro's truevector service was suddenly shut off. I reboot trying to bring it back to normal. The system just would not load it up, and hung right there. I repeat several times to no avail. Why would a service so esential as it can be turned off by another app ? Strange and let me worry. Has anyone had any clue? I have since removed ZA pro in Safe Mode. I will not reinstall it until I have received a reasonable explanation. Puzzle indeed.