I followed your link, but right now it does not appear as if you will successfully recover this install.
I would fix the fan first. Heat will burn your/her legs, ruin the finish on your table or desk, and cause all sorts of other problems with the motherboard and other hardware. It could easily cause your hard drive to fail prematurely. I hope that has not already started and is the cause for your current situation. Fix the fan first.
Then, install 7.
Lee