Hello, I've been trying in my very limited way to tidy and clean my daughter's pc, which has never had any such attention since she got it. I've used CCleaner, A Squared, Norton Systemworks, Ad-Aware and am currently having a bit of difficulty getting rid of two Trojan viruses (Norton couldn't delete them), but I'm here now to ask why, when, say, checking email, other websites appear out of the blue and what I can do to stop them. They're not pop-ups, as such, well, not as I understand them, but full-page websites advertising this and that. Sometimes, too, when one appears it seems to have the effect of losing/deleting the email browser.
Hope that makes sense and that you might be able to offer some assistance. Simple language please!