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====== Office Activation and MS App Issues ======
I have recently ran into issues on Windows 10 with the App Store missing or unable to open, the calculator not working (how did MS mess that one up), and Office having activation issues.  The first time seemed to be a fluke. After all, it was right after a factory reset. The second time was after a hardware repair with Windows cleanup and update.  Seems like these things are new Windows features. Here are some steps I took to get things working again.

Make sure Windows and Office applications are up to date.

If you get error **0x80070005** in Office applications, you can try to fix the issue by updating the registry.

**Note:** Before updating the registry, kindly take backup of the registry: 

For updating registry, kindly try to perform below steps:

  - Close all Office apps.
  - Right-click the **Windows** button in the lower left-hand corner of your screen and select **Run**.
  - In the Open box, type **regedit**, and select **OK**. \\ Select **Yes** when prompted to allow **Registry Editor** to make changes to your device.
  - In the Registry Editor, expand **HKEY_USERS** and select **S-1-5-20**.
  - Right-click **S-1-5-20** and select **Permissions**.
  - Select **Add**.
  - Type the logged in user's name, select **Check Names**, and then select **OK**.
  - Select **Advanced**.
  - In **Advanced Security Settings**, on the **Permissions** tab, select the user you just added, and then select **Edit**.
  - Under **Basic permissions**, select **Full Control**, and then select **OK**. \\ This takes you back to **Advanced Security Settings**.
  - In **Advanced Security Settings**, on the **Permissions** tab, select **NETWORK SERVICE**, and then select **Edit**.
  - Under **Basic permissions**, select **Full Control** (if not already selected), and then select **OK**. \\ This takes you back to **Advanced Security Settings**.
  - In **Advanced Security Settings**, select the checkbox named **Replace all child object permission entries with inheritable permission entries form this object** and select **OK**.
  - Close Registry Editor and restart any Office app to try to identify the issue result in Outlook

Meanwhile, you can also try to run Office **as administrator** (Right click Word or Excel or Outlook, select Run as administrator) to see if it can help.

If the issue still persist, kindly try to fix the Office or Outlook related issue via SaRA tool. So, kindly try to download Sara Tool and sign in with your work or school account and select the Office or Outlook issue you want help with.

Here is the download link for SaRA tool: [[http://aka.ms/download_SaRA|Download Microsoft Support and Recovery Assistant for Office 365]].

For more information about the tool, see [[http://aka.ms/use_SaRA|Automatically diagnose and fix Outlook issues]]. 

**Note:**  Uncheck the box to let the organization control the device and use the link to log in to the application only. This seems to bypass some additional checks.

Run a System File Check on your operating system. Open a command prompt/PowerShell with administrator rights, type **sfc /scannow**, and then press **Enter**.

===== MS App Store =====
Try running **wsreset.exe** to see if that does the trick. I found that this process was timing out, so it was a more involved issue.

Run the troubleshooter:
Select the Start button, and then select Settings > Update & Security > Troubleshoot, and then from the list select Windows Store apps > Run the troubleshooter.

Check the Microsoft Store Install Service
Press the Windows Key + S and type in services.msc.
Find the Microsoft Store Install Service and double click, If the status is Running, click Restart
If Disabled, change it to Automatic, click Start and click OK.

Reset the Microsoft Store app in Windows 10
Open Settings.
Go to Apps -> Apps & features.
On the right side, look for Microsoft Store and click it.
The advanced options link will appear. Click it.
On the next page, click on the Reset button to reset Microsoft Store to default settings

Uninstall the Store:
Press Windows key + X
Click and Run Windows PowerShell as Administrator
Now Type: get-appxpackage *WindowsStore* | remove-appxpackage
Enter then proceed to reinstall Store

Reinstall the Store:
Press Windows key + X
Click and Run Windows PowerShell as Administrator
At the command prompt, copy-paste the following then hit Enter:

Get-AppXPackage *WindowsStore* -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

Launch the MS Store

  * https://thegeekpage.com/reinstall-microsoft-store-app/
  * https://www.winhelponline.com/blog/restore-windows-store-windows-10-uninstall-with-powershell/#:~:text=To%20restore%20or%20reinstall%20Windows%20Store%20in%20Windows,press%20ENTER%3A%20That%20reinstalls%20the%20Microsoft%20Store%20app.
  * https://store.rg-adguard.net/
  * https://answers.microsoft.com/en-us/windows/forum/all/error-code-0x80073d05-on-windows-10/a37b67c0-bde9-40e5-b785-ebfc635eccd2