so I try to access another computer on my network and it says that my access is denied and to ask the system administrator if I am allowed to access the computer.
Why? I used to be able to access it until my dad reformatted the system... what is up?
I've done that network setup wizard a billion times, i'm not sure what's going on.
Maybe you could offer more information?
Try enabling the guest account on the offending PC, as long as your network is firewalled (behind a router w/ firewall) you should be safe. Is anything shared out on his PC? Also make sure the software firewall is turned off on the remote PC.