I just discovered the same problem. Print spooler will not stay running. It affects, of course, all printers - print to PDF, HP, Canon, etc. that I have on my computer.
I upgraded to Adobe Acrobat a few weeks ago and thought initially that was the problem, but I don't think so anymore. I had one ticket with Microsoft and thought we fixed it when the spooler ran again and then stopped by the time the phone hung up. But alas, I am getting pretty ornery too.
I have tried everything but reinstalling Windows 11 or going back down to Windows 10.
Any help is appreciated.
Thanks,
Jonathan