infected computer!

The JS.Exception.Exploit.B virus infected my computer somewhere in the temporary internet files and it keeps me from staying logged into any site. It's really pissing me off. I have Norton Internet Security but says the file cannot be accessed. Ahhhh. Will a system restore, to say a month ago, get rid of it or is there something else I can do. I'm a computer dummy so I need a really good explanation!! Any help would be so appreciated. Thanks

success...hopefully. I burned all my files/mp3's to a few CD's for a backup (shows how much faith I have in my computer skills) then went at it. Windows XP system restore is pretty cool. It seems to have worked as I'm able to stay logged in now. Dumb Norton has no fix, no support and they say nothing other than it runs java applets and does mass mailings. Arrr, oh well hopefully it's fixed.

Did system restore actually get rid of the infected file(s)???