avpx.exe is a worm W32.Rbot-AYN. avpx.exe opens a back door. avpx.exe spreads via open network shares. Related files: %System%\avpx.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill avpx.exe process and remove avpx.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.