I am working on someones computer, there tower wont turn on at all. I have not looked at the computer yet. From what they described either the power supply or the mother board is gone. If the motherboard is gone, can i take her hard drive and put in it in another tower and windows still work? Without reinstalled windows. They have windows Vista installed, factory image. The other tower is an HP Pro Desk 600 G1. There computer now is an e-machine or a dell.