Solution 2: Make sure that the date and time are correct on the computer. Solution 3:Clean boot your own system like this... Solution 4: With the admin access, run the below command in PowerShell: get-appxpackage *Microsoft.Windows.Photos* | remove-appxpackage Afterwards, (Uninstall and/or) reinstall the problematic app. We just take the Photos app for Windows 10 here.
Optionally, perform a thorough malware check in Safe Mode using the recommended avast Internet Security in this video. Other voices: 1. Check if the app has been blocked by system or some 3rd-party firewall software. 2. Give Google DNS a go. 3. Change the file permissions of the Windows folder. Note, by default, Read & execute, List folder contents and Read should be enabled. 4. Change HKEY_USERS, HKEY_CLASSES_ROOT, and HKEY_LOCAL_MACHINE (which are located in Registry Editor) permissions. Make sure that permission to Read is set to Allow.