You may be unable to download new apps or update existing apps using the Microsoft Store due to error 0x800706D9
— Something unexpected happened. Error code 0x800706D9
translates to “There are no more endpoints available from the endpoint mapper”, which doesn’t make much sense for the end-user.
Also, the same error is shown when you install or update apps using PowerShell.
The error message is:
Add-AppxPackage: Deployment failed with HRESULT: 0x80073CF6, Package could not be registered.
error 0x800706D9: While processing the request, the system failed to register the windows.firewall extension due to the following error: There are no more endpoints available from the endpoint mapper.
This post tells you how to fix Microsoft Store 0x800706D9
in Windows 10/11.Read more