Hi, I'm using Windows 7 Pro x64 Rus, account has administrative rights. I download Prevx 3.0 from official site and run it. Then window appears and offers me to choose OS (shows my Win 7 x64 in the appropriate field) and laguage (english or russian). I agree with it by clicking "Next" and everything disapears. No runing prevx processes or something like that So I came to "C:\Users\UserName\AppData\Local\Temp" and ran "pvxinst41.exe" (There're lots of files with similiar names). The error appeared that the file version is not compatible with my OS. The same thing is with installing Prevx SafeOnline. Downloading and installing Prevx 22.214.171.124 in save mode doesn't solve problem at all. I also tried to install Prevx 126.96.36.199 on other PC with fresh installed Windows 7 x64 Pro Rus. Result was the same: Setup window disapears after choosing OS and language and clicking "Next" But old version - 188.8.131.52 (which I downloaded some months ago) installs and works fine. Release candidate 184.108.40.206 installs and works fine too. Tried to install Prevx 220.127.116.11 on Windows 7 Home Prem x64 Eng - everything was alright Is there any problem with Pro version or russian localisation? If there is a bug in Prevx 18.104.22.168, I hope that release candidate solution will be in official release too.