Just try installing PrevX 3.0 on a Windows 7 machine with Kaspersky Anti-Virus 18.104.22.1686 (the latest build) already installed. Everything seemed working fine until I did a reboot. I still managed to log on my computer but with a black screen (I tried a few times with the same result). As a last resort, I logged onto Safe Mode & run the Prevx 3.0 Removal Tool -ForceUninstall.exe to solve the problem. Are special settings required for both to co-exist? Thanks for the help!