MaxMySpeed fixed my computer, took about 4-5 hours, found many errors, viruses, malware, that was making my 3 year old laptop freeze up. I have had Norton, McAfee, Spy Doctor, and other free anit-viruses, but apparently the virus I had was not letting them work. They also replaced my Windows Vista with Windows 7. Maybe my computer was beyond repair of the other online fixes, but what MaxMySpeed did, it worked, and they will be available for further problems it encounters.