|Go to a command prompt and type ipconfig /all and post the results.|
If you are a using a router, which with two computers you probably are, all you ISP can telll you is if your router is getting a valid IP address. The ISP cannot tell is the router is passing a valid IP address onto your computer. ipconfig /all will tell you.
Im aware that it might be a firewall problem so I just went and uninstalled any anti virus
So why did you uninstall your Anti Virus. An Anti Virus is not a fire wall and will not block a network connection in the same way as a firewall can. Reinstall your anti virus, it is unlikely to be the problem