I had Spybot S&D on my old lappy, as well as AVG (free but asking for an upgrade except the upgrade didn't seem to come in a free version)and Adaware but then a guy at my mom's work when he checked it out for me removed them all and replaced them with Microsoft Security essentials saying all three were cool but obsolete.

Now I have MSE on my new lappy now as well. This guy is an expert and even chose this lappy out of several choices I had selected off of Bestbuy.com I sent with my mom to work. I trust what he says.
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Weird thing happened to me yesterday. I was checking something on my FB, and suddenly this window popped up at me saying 'You have chosen to download and install ____'(don't remember the name, didn't really care to look closely) and asked me to either save or run it. I zapped the damn thing away within seconds because I knew I did NOT choose to download anything, I NEVER download anything on this lappy in attempt to keep it healthy and fast. I know downloading too much stuff gets you a bunch of bugs.

This was new though, I have never had this happen before on this lappy or my old one.