So I seem to have a virus which redirects to advertising websites when I click on a link from internet searches. I suspect I may have other viruses too, or this virus has corrupted other stuff because my defragmenter (which is supposed to run when the computer goes into screensaver mode) gives an error message every time it tries to start. My computer screen has also mysteriously turned completely black a couple times, which I was only able to rectify by restarting the computer. After following the 8 steps, at first it stopped redirecting but now it is back to doing it again. I am most definitely not a techie person... I really appreciate any help you can give me.