If you want to install Windows Photos with Powershell you can use below command. And you can install Windows Photos easily.

Dont forget to run Powershell with Run As Administrator!

Get-AppxPackage -allusers Microsoft.Windows.Photos | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)\AppXManifest.xml”}

Other hand if you want to uninstall Windows photos you can do it just one command as well.

Below command uninstall Windows Photos application from your computer.

Get-AppPackage -Name Microsoft.Windows.Photos |Remove-AppPackage