use teamviewer. If the other guy s not there, Since u have physical contact with that computer go and put teamviewer inside it. U dont even need to install it. U can run it as standalone. Then u note down the User ID and password the program generates in the remote computer. And just come to ur PC and run the same teamviewer, connect it with that user id and password. Thats it. There u go , u got the fully functional computer. If u have any doubts using teamviewer, post it.