Failed to Register SharePoint Services in PSConfig (Fix)
Unfortunately this happens on Stand Alone servers more often than you would think. Good news is that there is a really quick way to fix this.
Open up Regedit and browse to:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office Server\15\LauncherSettingsCreate the following key:
Name: AcknowledgedRunningOnAppServer Value: 1
Then do the same thin in the following registry
No need to restart, just rerun PSConfig and you should be good to go.