WinMHR is free malware check utility with additional features. WinMHR is full featured with no ads or nag screen and free for commercial and non commercial use. WinMHR works differently then other utility. It calculate hash for a every file and then check against its remote database for possible malware. The hashing process done in local pc and sent to the WinMHR server. WinMHR do not download any updates or malware signature file as all updates are done on WinMHR servers. It works on Windows XP SP3, Windows Vista and Windows 7. It take very small space in the system.