i had problems with my comp so i did a system recovery..i had to make 8 recovery disc! if you have those disc or blank ones make a recovery disc then do a sytem recovery...its well worth it! my comp runs smooth now, and that was a few months ago...sytem recovery will delete everything from your comp! makin it the same exact way you bought it from the store...so you have to save your audio,or any files you want to save on too disc....if you have major problems do this!
if not just try an find some spy ware removers...i use full versions of everything i get so i try to stay update with definations and all that shit.. i use adaware and spysweeper..plus with adware you get ad watch, wich tells you a program is tryin to get into your registry...so u can either except or block it....
make sure you have a firewall, and are up to date on your virus scan too...IE pretty much sucks so check out
www.mozilla.org (like bong said)....