Well I tried the iso rather than usb, must have messed up the usb creation somehow, repair done and windows store now works!

Yup, tried all that. Saw the other thread where the repair fixed the same problem. Only difference is I used USB rather than ISO, but I can't see that making any difference with this key thing?

Just trying to fix windows store, somethings corrupted somewhere.

Activated no problem, under system it says "windows is activated"......maybe I'll just create a new user profile and copy over my stuff?

I followed this but it's asking me for a Windows key?? That doesn't show up in the step by step? I got a key viewer software to show me key, entered it and it says not valid? I upgraded from Win7 and...