Use remote desktop to access to other computers on a small office or home network

Open Remote Desktop Connection program:
Start > All Programs > Accessories > Remote Desktop Connection
Enter name or IP address of computer that you want to remote then click Connect

You may get security screen on the first time use remote desktop

(check on "Don't ask me again for connections to this computer") then click Connect

Check on "Don't ask me again for connections to this computer" > click Yes

Enter username and password to login

Now you can use your friends's computer from your computer