other thing about hacking ;)
if you hacked take off the internet cable from your pc then restart you pc without internet then open your pc then click on system restore :) then choose the last system restore after that do a virus, trojan (most anti-virus programs have it), and spyware scan to your pc after that do a registry scan too, to make sure everything goes back to normal ;), finally if you choose your ip address to connect ot internet then you have to change it or change it to automatic ip so he can't hack you again, but the problem is if he got your physical address then your done and my best advice is to change your internet card because if he got your physical address even if you got 1,000,000 best firewall programs in the world he can hacked you easily without any problems why? ok because most of the firewall programs are to watch over your ip address and make a ghost ip address to protect you from hacking but the physical address is like your cell number you can't change it unless you buy a new internet card (eathernet card) and if you want to see your physical address do these steps
go to start --> run --> then inter "cmd" then click enter (it will open a new window in MS-Dos mode ---> type "ipconfig /all" then click enter. wallaa there it is ;) ( i use it to ban some internet users from using my internet account ;)) i hope i helped you ;) take care and dont forget to every month to make a chick point for system restore