I have a MacBook pro and I would like to be able to shut down a Windows 7 computer connected to the same wifi. Please be detailed. Thanks
You mean shut it down like its just up and running (and you currently dont have access to the machine)?
... or do you mean you want to have remote access (so you can shut it down, reboot, access the system/console like youre sitting at the machine), and you can currently access/install/config remote access on the Winders© machine?
edit: or.....
download apple;s free remote desktop tool, use that account that has remote access as credentials in the app and get remote desktop up and shutdown like you would normally. Command line you will find much faster