Do you have a full security suite on it?
many of the top names are having specials right now.

the one I have sent me an email the other day -it looks like it is still effective-
http://neurotalk.psychcentral.com/thread109189.html

do you use a browser add on that helps you avoid unsafe websites?

like WOT {web of trust} color codes sites and will block the real bad ones..
http://neurotalk.psychcentral.com/post479619-4.html


you probably can clean it your self - just takes some learning and the "want to" factor
If you can't clean it then hopefully nothing real important is on it and just do a wipe & fresh install of windows..
or get a flash drive or an external drive to save important things before a problem appears..


I figured out how to fix mine many times after crashes , but I decided I'd rather buy a good full security suite and use add ons for the browser {and not IE - I use Firefox mostly or Opera}