Easiest way to connect to Raspberry Pi command line is to use windows application Putty. You can download it from: http://the.earth.li/~sgtatham/putty/latest/x86/putty.exe
Put name of your Raspberry Pi (or IP address if your router doesn’t suport hostnames – highly unlikely) in the right field and click Open.
As your credentials put one that matches your distribution ( if you haven’t change it ).
Raspbian – user: pi , password: raspberry
OpenELEC – user: root , password: openelec