Anybody know of any good and light internet security?

i've tried kaspersky (too many junk files it makes) i've tried avast (do not like) i've tried prevx (too many false positives) avg same as kaspersky norton i do not like avira is too heavy same with comodo dont like eset either im running Windows 7 Home Premium 64-bit Intel Core i7 CPU @ 2.00GHz 4GB ram

Microsoft Security Essentials is free, lightweight, and very good.

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