You probably have a virus. Does it keep redirecting you to a search page? Sometimes these hackers(or whatever theyre called)redirect you to their own search page. Have you downloaded anything dodgy? Smileys? Anything your not 100% sure about? I downloaded a smiley and my p.c f&*k$d up! Luckily a friend told me wat to do. I had to re-install Windows and will probably lose your stored data & programs, i'm sure you can back them up, i just don't know how! But before you take my word for gospel, don't do anything drastic. Ask a p.c engineer/someone who knows a bit about computers insides! and they should be able to help you. I can only hazard a guess at wat's wrong based on your description. Hope this helps?!