If you find that you being prevented from using the internet and you are getting pop-ups stating your pc has been attacked, then you need to get rid of this thing fast. It will infest your pc's registry. Basically it is a name changing rip-off rogue application that deliberately reports false system security threats. It can run under a few guises such as XP Antispyware 2011, XP Guard or XP Internet Security 2011, XP Home Security 2011........all these are FAKE security programmes. The loons that are sending out this scam ware are after your money by telling you to purchase their XP Anti-Virus 2011 .............but DON'T. However, there is a fix so don't panic, you can get rid of it by running any good spyware prog like Spybot or similar. If you are running Windows 7, they have made it so that it will also attack this OS too. So be canny and get a good anti spy/bot installed before this thing gets you. Keep ahead of this loons !