Is there any way to connect to another computer who uses the same network for the internet?
Yes, but you need to know the name or IP of the computer you want to connect to. You also need to make sure the setting is enabled on the computer you want to connect to for “allow users to connect remotely to this comoputer”; to check this go to Start, right-click My Computer, go to Properties, check the box under the Remote tab. To use Remote Desktop Connection, I go to Start, Run, type “mstsc /console” (don’t use the quotes), hit Enter, and the RDP window appears. Here you type the name or IP of the computer you want to connect to, hit Enter. This is if you want to logon to the machine through Windows Logon. If you’re just trying to get to a file, you can use Windows Explorer, in the Address Bar, type \\computername\driveletter$, then hit Enter; you can also substitue the computer name for the computer IP.