mcfCC4.dll is a worm W32.Starimp. mcfCC4.dll spreads via open network shares. mcfCC4.dll monitors user Internet activity and private information. It sends stolen data to a hacker site. Related files: %System%\mcfCC4.dll %System%\mcfdrv.sys Adds the value: HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\mcfdrv HKEY_LOCAL_MACHINE\SYSTEM\CURRENTCONTROLSET\ENUM\ROOT\LEGACY_MCFDRV HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\mcfCC4 to the Windows startup registry keys. More info: http://securityresponse.symantec.com/avc... Removal: Remove mcfCC4.dll from Windows startup using antivirus (also check How To Remove section)Startup Optimizer.