Today I had a sudden unexpected problem arise that never happened before. I was browsing the web, and suddenly my mouse stopped, cursor stalled, mouse went off, and the whole computer stalled and crashed. Then I restarted a number of times, maybe 6 times before the mouse worked again, and I then went into safe mode (I use Win XP), and did a virus scan, nothing came up - before the pc crashed, my firewall had warned me there was a downloader from a website that was perfectly safe a year or more ago, but we think some wretched scammer/hacker stole that domain from that website and made it into a virus website, but that downloader didnt show up in the virus scan so I think firewall may have prevented it? I use nortons 2006 (always updated renewed yearly) for both anti-virus and firewall. Then I restarted computer back into normal mode and everything was ok for a bit and then the mouse went off suddenly, no red light, nothing, and the keyboard would not work. The computer is a 4 yr old pentium 4 that's about all i know about the hardware. What could be the problem?