Hack Computers in network

u can hack any system as it is connected to INTERNETwhich allocates a port for communication and Data Transfer.
steps:
1.Download software PORT SCANNER.
2.Copy the ip address of the victim whose port is open. 
3.Download NETLAB software 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.