mvsql.exe is a Trojan W32.Tilebot-AN. mvsql.exe opens a back door on IRC channels. mvsql.exe spreads via open network shares. mvsql.exe monitors user Internet activity and private information. It sends stolen data to a hacker site. Related files: %System%\mvsql.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill mvsql.exe process and remove mvsql.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.