Well as i already mentioned u can hack any system as it is conected to what we call INTERNET . To connect internet a system allocates a port for communication and Data Transfer. SO here it goes all we goto do is get into that port thats hacking.
1.Download software PORT SCANNER.
2.Copy the ip address of the victim whose port is open.
3.Download NETLAB which gives u all information includes victim ip address,Area from where he is accessing internet....
4.Paste the ip of victim u found initially into NETLAB .Thats it u access his system.
5.you can download netlab 1.4 and port scanner softwares from www.piratebay.com and torrentz also.