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Christopher42:  One more fact about the persistent driver that will not be removed:  if I highlight the file (In drivers) and click on Properties, it tells me it is a "Help File" (UniDrv.HLP).  I can't find a way to close it so that it will not be in use, thus allowing me to remove it.

 

 

 

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Using the 'Printer Server Properties' menu to delete nasty printer drivers would be my last resort too. Other idea: Menu 'Run the troubleshooter' below 'Printer server properties'?
Hope someone else can help how to unlock driver 'in use' ...

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Thanks Chris. After a day of trying to get my printer back after the Windows 10 upgrade, your 'compatibility' fix did the trick. You are a genius - many thanks!!

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