I hope you seriously don’t expect anyone to believe that.
Win8 can’t install itself unless you did it manually.
The last time I really used that computer was when we would have the "24" threads on Monday night.
The phone company guy used it when he set up my network a few months ago, but he used firefox, and just did some stuff to link the tv, and all my computers.
I don't see why he'd have put windows 8 on it.