Hello,
If you have a Windows 8.1/2012R2, you should noticed :


I find that pretty annoying, hopefully, there is a solution :

Get-ChildItem 'HKLM:SOFTWAREMicrosoftWindowsCurrentVersionExplorerMyComputerNameSpace' | Where-Object -FilterScript { $_.PSChildName -as [guid] } | Remove-Item -Verbose

And now, “This PC” is “clean” :