======Microsoft - Windows - Printing - Troubleshooting======

=====The specified printer driver is currently in use=====

When trying to remove printer drivers on a Windows Server 2012 R2 Remote Desktop Session Host server the following message is displayed "The specified printer driver is currently in use" and the driver is not removed.

Workaround:
  - Open the registry editor.
  - Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Providers\Client Side Rendering Print Provider.
  - From Servers\<printservername>\Printers\ delete the {GUID} folders where the "Printer Drivers" REG_SZ value references the printer driver to delete.
  - //May not be necessary.// From all the S-1-5-21-* delete the Printers\Connections\,,<printerservername>,Printername of the printer that was deleted.
  - Restart the Print Spooler service.
  - It should now be possible to remove the driver.

Source: [[http://www.eversity.nl/blog/2012/06/the-specified-printer-driver-is-currently-in-use-error-is-shown-when-removing-a-printer-driver-in-windows-server-2008-r2/|Eversity - “The specified printer driver is currently in use” error is shown when removing a printer driver in Windows Server 2008 R2]]