I just had a series of problems with my computer and was hoping someone could explain what might have happened, as it's a bit worrying. Basically, my mouse suddenly became really slow and difficult to control, the keyboard was suddenly totally unresponsive (so Ctrl-Alt-Delete didn't work), then after a minute or two the computer switched off entirely - i.e. didn't just shut down or restart. Does this sound like a virus? All help appreciated. 🙂