Several of my Windows Store Apps (Photos, Contacts, and Weather) were badly broken on my computer so I tried a lot to make them work again. They didn't start and the event log recorded "Illegal remote procedure call". I tried the Control Panel's troubleshooter (didn't find anything wrong), several powershell commands (most failed with "couldn't register app, AppXManifest.xml not found", tried to give permissions to the "Admins" group and such things. However, none of these worked. Also, check
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