$sys$xp.exe is a Trojan.Stinx-F. $sys$xp.exe opens a back door. $sys$xp.exe tries to terminate antiviral programs installed on a user computer. Related files: %System%\$sys$xp.exe More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill $sys$xp.exe process and remove $sys$xp.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.