As domain admin in my corporate network I can print every pdf and every other files. But users on a domain cannot print some pdf's, they can print Word and Excel files. When they try to print, the printers get sucked with some error and need to be restarted. The same documents as a domain admin I can print them with no problem, tried from different machines. All printers are served from the print server where everything is correctly set up and all new drivers are present. Any idea why this is happening. We are using Windows AD 2008, and Windows 7 64-bit.