can't browse internet

I have vista. A couple of days ago i was browsing internet but some pages would not load completely. Then I could not access any site with any browser. Since then I cannot access any site at all. I have a connection. Using linksys wireless router. All other computers can access internet through router. Only my dell studio 17 is unable to browse. I tried winsocfix but still cannot browse. I can ping google fine.
Please give me some suggestions.
Thanks

Did you download anything within those days


~Acid

Not that I know of. I just did a system restore to Jan 30, 2010 and I am now on the internet. I am in the process of updating my anti virus definitions and windows update.
Thanks

Good ^^ I Was About to mention a System Restore Lol ^^



~Acid