ipreg.exe is a password-stealing Trojan.Zagaban-H. ipreg.exe monitors user Internet activity and bank information. It sends stolen data to a hacker site. Related files: %System%\ipreg.exe %System%\spdr.dll More info: http://www.sophos.com/virusinfo/analyses... Removal: Kill ipreg.exe process and remove ipreg.exe from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.