Gahh, I've tried 3 times to install it.
First time my power went out when I tried to install it, this broke my computer and I had to ask my dad to help me get it to work again. After about a day of swearing we got it to go back to an old version, windows 7.

I waited a couple of days, then I decided to try and install it again, this time after 2 days it was still stuck on 16% in the semi shut-down mode. This time I couldn't have it off any longer since I got school work to do, so I shut of the power again, and do the reboot to an old version.

Now I decided once again to try and install it, now it's stuck on the "working" after you just open the stupid application in the bottom right corner.

Lastly, this have apparently made it so my Webb-cam, it's a Logitech HD pro c920 doesn't work properly any more either. I can have it work while in Skype conversations, but I can't capture images which is making it really hard to authenticate myself for my online school work......

I need help, and neither Logictech support nor Microsoft have given me good answers....