Traumatic upgrade to Windows 10

I deeply, deeply fear Microsoft so I have postponed the upgrade. But curiosity is human and I caved in...
Much to my surprise the update worked, but after the update nothing was working :o)) ... everything was just "not responding".
Finally I restarted, opened powershell as administrator (it took me ages just to do that, as nothing was working) and pasted this command
Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Surprisingly, things seem to work much better. However if I could go back in time I would NOT upgrade... who knows what other surprises are still waiting me....