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Not the question that you asked, but I would go with the free Microsoft Security Essentials, used in conjunction with Malwarebytes. All are free and give excellent results. The only AV that I know of that has not caused problems is MSE, too.
My Computer
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Windows 10, Home Clean InstallIntel Core2 processsor Q8200(2.33Ghz 1333FSB)...6 gbATI Radeon 256MB HD3650
MSE is nice for the average user but I strongly recommend NIS for more protection. Microsoft Security Essentials provides basic protection only. MSE won't protect you against most online threats http://store.purplus.net/noinse201do.html
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My Computer
At a glance
Windows 10 Pro x64, Arch LinuxIntel Core 2 Quad Q8200 OC'd 3.08GHz8GB DDR2 900MhzMSI GT730 2GB GDDR5 (Kepler)