Sorry, but here's a bit of problem. ;x The guy could have been running an IP spoofer. I know some that run 20-120 dollars, and you can use them to change your IP on the internet. (Or at least mask it.) One way to know if you've been hacked is this. On XP, go to Start<Run<then type Command, and then type Net Statistics Server. Now, look at "Sessions Accepted" If it says "1" you should be okay. If it says 2 or more "OMG U GOT H4X0R3D". (Or at least your PC was.) Seriously, it should only say 1. Everything else should probably be 0. (there are exceptions to this, but it does help.)