PowerShell commands: errors and failure to register the Store

I have spent many hours for the last two days trying to get the Store and several apps re-registered and working. On other forums which I have been directed to, such as MS TechNet, much of the advice and links I have been given either generate various errors, or just fail to work. So I have tried here: How to Re-register the Store in Windows 10.
Again I get errors, commands not recognised and so on.

What is going on? I have activated the Windows Firewall, I have entered everything using Copy & Paste, so what else must I do to carry out this fairly common procedure?

Post the command you're typing

Get-AppXPackage | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register

"$($_.InstallLocation)\AppXManifest.xml"}PowerShell -ExecutionPolicy Unrestricted -Command "& {$manifest = (Get-AppxPackage Microsoft.WindowsStore).InstallLocation + '\AppxManifest.xml' ; Add-AppxPackage -DisableDevelopmentMode -Register $manifest}"

PowerShell -ExecutionPolicy Unrestricted -Command & {$manifest = (Get-AppxPackage Microsoft.WindowsStore).InstallLocation + \AppxManifest.xml ; Add-AppxPackage -DisableDevelopmentMode -Register $manifest}

Some of many links I have been given and which have failed

No, reset just produced the message "we cannot reset this app"

Looks like the command syntax is not right. The path switch is a positional switch. If it is not the first argument you must prefix the appxmanifest.xml path with -Path

Hi

I tried the .bat file at the same time as I tried the Power Shell command from this forum, with the same negative result.

Some of the PowerShell attempts produced a lot of red print which I guess is indicating errors (?), but I did get some which seemed to finish correctly all in green ---- but still did not restore anything.

My puzzlement is added to by the fact that this is a new computer with newly installed OS and Anniversary plus I have run sfc and Dism, so I am not expecting any accumulated corruption.