When trying to configure a printer port, you get this error:
An error occurred during port configuration. Operation could not be completed (error 0x000000aa).
The Operation could not be completed error occurs when you try to configure a printer port that has a print job currently assigned to the port / logical printer.
To fix error 0x000000aa, open the printer to See what’s printing and delete any jobs you see. Failing this, restart the Print Spooler service and try to configure the port again. If none of the above work, reboot the computer.