Thanks, that's very reassuring. Yes I did scan memory, to be honest I don't really know what I'm doing (trying to learn!) and a friend suggested a while ago when a virus showed up to scan the memory as well as everything else. Is there no point scanning the memory then? Why was cycbot diagnosed? The computer was behaving a bit strangely (glitchy, programs not opening etc) but now it seems ok.Sorry if it seems like I'm wasting your time, I find this stuff fascinating but so far pretty bewildering...