I wonder if you have a hardware issue then. Seems odd that you can't get either OS to work, but Im not sure how to help without more info.
I installed windows 10 onto my laptop, it was super easy and fast. Then I sold my laptop. So my PC is still on 7, but I thought 10 was pretty cool so maybe one weekend when I have no plans and am bored I will upgrade my PC.
Thanks. Yeah, that's what I'm thinking, that it's a hardware problem. I'm affraid I have an 'Alienware' Dell pc, (or piece of shit) and up until now it has performed pretty good. The last time I tried it I was able to revert to the an earlier reset point, or factory settings, but somehow not this time. I can only boot from the dvd drive.
The pc boots from the dvd drive with my windows 8.1 disc in it and I can install Windows 8.1 and then having to go through the whole rigamarole of setting up a new acount, start up internet connection and having the start up menu, but the screen is totally screwed up. It has the basic Windows 8 screen with all the squares, but I can't open programmes from the backup 'Alienware' screen. I am able to go on the internet, but I can't open different tab pages. Plus my dvd drive acts erratic when I try to remove the install disc and install a different programme or game.
The when I try to boot up again, I only get a basic colour screen and then nothing. I have to repeat the whole process of installing from the dvd drive again.
Really hope this gives a little more info.