How to Re-register all Modern Apps in Windows 8 and 10

Question

Sometimes modern apps will not load or open, the icons disappear from the task bar and they don't respond to any tap/click or command. Resulting in some apps returning:

Windows cannot find ". Make sure you typed the name correctly, and then try again.

No troubleshooter or workaround will work. My current built of Windows 10 is 9879.

Update: Brink (eightforums.com admin) added the 15th step after I talked to him about the solution.

Solution

To solve this MVP Keith Hill suggested to re-register all of the AppXPackages again using the next command in the Powershell:

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