In your post in the Browsers (that I just locked) you stated still another (albeit related) problem: "another problem im having is when i search something in a search engine and i click the link it directs me to the wrong website".

And 5 days ago you posted about removal of a trojan.

Obviously, you've been badly infected. The best I can advice: back to the beginning using either your manufacturer supplied system recovery CD/DVD/method or your Windows XP and driver disks for a CLEAN (that is: with formatting of the hard disk) install of Windows.