I can't format my laptop because it isn't mine (its the school's, and I don't have the permissions anyways).
Startup + login used to take 30 minutes! Now it just takes 5 minutes. Big speed boost 
So far, I've installed iTunes, a NVIDIA graphics card update, CCleaner, Defraggler, uTorrent, VLC, and Google Chrome 
Quit looking at pron tibs and you won't have to do this. WTF 5 minutes. Might I ask your specs on that ancient pos? Mine takes about one minute fully operational. It was much better when I first reinstalled but my wife likes her Sims3 and whatever other games she keeps putting on here. We all use McAfee total protection multiple pc bundle (about $90 a year). It works rather well except it's a memory stealing while it runs in the background. I tried norton, trend micro, and some others a long time ago. I was unimpressed with pricing and performance. Problem with a lot of your free or online/free scanners they want you to buy the next best thing. They sometimes will tell you there is viruses or registry problems with your computer and now you have to buy the better one to remove them. This is bs, but a trickery of sales. With McAfee you can always download a 30 day trial you don't like it remove it. Adaware Se and Spybot SD are free but do not use firewall. They are good for removing registry errors and the other crap you don't need.
Really all in all they all suck at some things but work with others. As with most things in life you get what you paid for.