Upgraded from (legal) Windows 8.1 Pro (with Media Center) to Windows 10 today (using iso).Had an issue when installing (kept on searching for updates… had to abort the process), but it continued well afterwards. Now i want to work with it, but not a single app is working… it just says (hope I translate it correctly to English):"This app cannot be opened.Your trial period for this app has expired. Go to Windows Store to by the full app."But also Windows Store app is not working, just as all my other apps that were previously there (Windows Music is working, but i cannot logon with my (paid for) account), just as start menu, notification center, etc. This seems like a huge activation issue. Any help would be greatly appreciated!! Evert

Unfortunately, I don\’t have enough posts to insert links….therefore, I will tell you what you need to do. The following fixed ALL my problems with Microsoft Edge, Mail, Calendar…everything…! ***YOU MUST HAVE THE WINDOWS FIREWALL SERVICE RUNNING FOR THIS TO WORK***1. Find C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe2. Right-click and Run as Administrator3. Copy this line: Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\\AppXManifest.xml"} 4. Right-click in the Powershell window to Paste and then press Enter.5. There is no need to restart. The fix should implement right away. If you have previously disabled Windows Firewall or do not have it running, the above steps will result in errors. Use the steps below to enable Windows Firewall and the reverse if you wish to turn it off again afterwards. 1. Right-click the Start button -> Click Run2. Type Services.msc and press Enter3. Scroll down to find Windows Firewall4. Right-click then click Properties5. Under Startup Type dropdown -> Select Manual. Click Apply6. In the top left portion of the Services Window, Click Start this service.7. Now follow the steps in the first section, and it should work. These steps worked for me. They have no guarantee to work for you. Just trying to spread some help/love. Best of luck to all in your troubleshooting.

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