A few weeks ago the rogue syware that pops up and says your computer is infected and it is going to do a scan popped up on my computer. I finally got it off my computer but since then I keep getting advertisements popping up. Just now I was on this site and all of a sudden my computer screen went blank and and ad for free credit report came up. Also, something has hijacked my web browser. I use msn for my homepage but if I put in a search an entirely different site comes up. Anyone know how I can correct this? I am using Yahoo's virus scan, spybotscan, spynomore and bit defender. None of these pick up anything on my computer.