I've used many of the top ones on various computers - each has their own special features that I like. McAfee is OK, Norton is good but a memory hog, TrendMicro I disable on ANY computer I sit down on, AVG I've used for years, and my personal favorite is Spyware Doctor. While not necessarily an AntiVirus product, it detects many trojan's and is a required product on any of my comptuers (even on employee computers).
Use AVG Free. 100x better compared to McAfee IMHO.
And less resource/cpu consumption.
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I think it is safe to assume that Trend Micro is what was causing all my issues then. I think I am going to try AVG thank you for the reviews. I hadn't considered that TrendMicro was what was messing with my speed and such! UGH!