This seemingly started happening just today. Previously all printers were working since the machine was new. Today any program that tries to print to any of the printers which are setup gets an error. Firefox says "an unknown error occurred while printing" other programs say related things. Our financial software just says warning and then aborts the print job.
I can print a test page from the printer properties page of a printer.
I have enabled the operational log in the event viewer and nothing shows up in it when I try to print. Neither does anything show up in the admin log.
I have tried it both with my firewall (Comodo) running and with Comodo totally closed.
I suspect an update but I went into the screen where I can uninstall updates and nothing actually shows up recently. I also tried to revert windows to a previous restore point. There is one from two days ago. No dice. It says something stupid about how it couldn't open the restore registry or something... I'm really starting to not like Windows 7...