I can't launch any Win8 apps after upgrading to Windows 8.1

Posted by locka on Super User See other posts from Super User or by locka
Published on 2013-10-19T16:49:25Z Indexed on 2013/10/20 9:59 UTC
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windows-8

I just upgraded to 8.1 and now none of the Metro apps start.

The issue is that if I start any metro app, including the Store and PC Settings they immediately fail. The classic desktop is fine, as are standard programs, it's just the metro apps.

If I look in the system event log I see errors like this:

*Activation of application winstore_cw5n1h2txyewy!Windows.Store failed with error: This application does not support the contract specified or is not installed. See the Microsoft-Windows-TWinUI/Operational log for additional information.*

In addition the tiles in metro have a small cross icon on them:

enter image description here

I suspect that my Live ID (which I somehow managed to skip during update) is not set properly and consequently none of the online stuff works. But how do I fix this? I can't start PC settings, I can't start store. I see no way in the classic desktop of setting these things. I don't want to have to reinstall for this. Is there a simple fix?

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