my friend just made me a computer...didn't cost us alot but when i try to play starcraft online something is not working...i can play regular but i can't play online. it works at first..but 5min into playing online..starts to lag bad...slowing everyone...just can't play online... i wonder if its the modem..cause im using modem thats like 3~4yrs old... or it could be something else that i need to change or get. can anyone help me?