I am also having the same problem updating from windows 8 to windows 8.1. I have tired to install windows 8.1 a number of times and am unsuccessful in completing the install .....same problem download is ok install is ok then reboot and then install fail and then goes back to windows 8 ..........and no help from Microsoft
My computer is a dell Inspiron 660 I core 5
I also have a Fujitsu laptop which l have install windows 8.1 with no problems at all .....this is very puzzling ....
Has anyone had the same problem as me when adding windows media center it always stops the computer from becoming activated this keep happening to me when I install media center on my computer it makes my computer product key become unactivated and when l tried to activated it again it will not activate but remove media center and my windows become activated again also very puzzling