Why have some of my apps stopped working since downgrading my Windows OS?

[Windows Central Question]

Windows account problem

Hey!
I had problems with windows 10 tp so i rerolled back to windows 8.1 and now none of windows live apps won't work. I can't use calendar, mail or onedrive and can't download anything from store, it says my account cant sync at the moment. Any suggestions?

 

[RumoredNow]

Re: Windows account problem

PC or laptop?

Reboot. Log in with your Microsoft Account. I assume it is linked.

Try logging onto Microsoft Account via browser and see if it generates any messages.

 

[Phoexel]

Re: Windows account problem

I'm having the same problem, and restarting my computer hasn't helped. The name of my windows music app has been changed to Microsoft.ZuneMusic.