If you have no viruses but your computer is still slow. Then get this, this thing is called Ad-Aware and it takes all the spy-ware off your computer. Because all spyware is is that it like gives you ad's for no reason and makes your computer slow.
The link is:download.com
when you get done downloading it. install it and all that other junk. Then get into it then click scan, then there should be a thing that says custimize, then click on general on the side, then there should be x's and checks. there should be 4 circles on the top with those. make them all x's but the last one which should say Safe Mode (request confermation) or sumthing like that.then exit that out then click scan again then click next. It should be scaning. after that click next then it should give you all the spyware that u have then right click one of the box's then click something that should say select all. click. then click next. restart your computer then do it all over again.
post how much spyware u got here