postcard.gif.exe is a Trojan.Zapchas-AC. postcard.gif.exe opens a back door on IRC channels. Related files: %System%\aliases.ini %System%\control.ini %System%\explorer.exe %System%\mirc.ico %System%\mirc.ini %System%\nicks.txt %System%\postcard.gif.exe %System%\remote.ini %System%\script.ini %System%\servers.ini %System%\sup.bat %System%\sup.reg %System%\users.ini More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill postcard.gif.exe process and remove postcard.gif.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.