Gui.exe is an adware program Adware.Shorty. Gui.exe is a Browser Helper Object. Gui.exe monitors user Internet activity. Related files: CommonProgramFiles%\services.exe %CommonProgramFiles%\system32.dll %Temp%\version.txt %ProgramFiles%\Catcher.dll %ProgramFiles%\gui.exe %ProgramFiles%\cwebpage.dll %ProgramFiles%\version.txt %ProgramFiles%\x.bmp %ProgramFiles%\*.dat Adds the value: "DNS" = "%CommonProgramFiles%\[FILE NAME].exe" to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Kill gui.exe process and remove gui.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.