As of yesterday, I can no longer print ANY pdf's.

Windows 7 Pro, 64 bit. Have had adobe reader on for almost a year. Can print everything else. Nothing shows up in the que (tried 2 diff printers and a bullzip pdf printer), R&R adobe XI, performed update. No windows updates were performed. Scanned for viruses ? parasites - system clean, even looked for root kit -none. Just stopped working today (tried rebooting too)