Hi Sunshyn2005,
Thank you very much for your advice. Unfortunately I keep getting this same Print Server Properties error message:
"Unable to remove HP Officejet 7400 series, x64, type 3 - User Mode driver. The specified printer driver is currently in use."
I get the above message even after restarting the print spooler per your instructions and restarting the computer. I’ve also tried turning off the HP 7410 and setting some other printer as the default printer before restarting the print spooler and restarting the computer but I still get the same Print Server Properties error message. Please advise. Thank you.