Windows 10: Computer won’t let me sign in now.

I recently changed my computer from a local account to a Microsoft account to try and reactivate my windows key after changing my motherboard. I have been running it for a couple months with the activate windows logo Doing this didn’t fix the problem so I just bought a new key and activated it. After turning my computer off I came back to it later and now am unable to sign into windows on start up. When I click sign in I am given a window that pops up and tells me I need to instal an app to do this and asks if I would like to browse the App Store. If I click yes nothing happens and it takes

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my computer won`t wake up after goes to sleep

these computer won`t wake up after goes to sleep ?

 

my n97 won t charge or connect

when i put a usb on my n97 it won t charge when i put on the computer it won t say nokia pc suite or else it not reading the usb cannot work on my phone plz hel

 

Skype won´t wok in 17063

Skype Won´t work... games won´t work...

Making backup and re-format...

Maybe I Install a Windows 7 again, At least, all of my games run smoothly ...Sadness!!

*Banghead