I have a Windows 2008 R2 machine serving as a file and print server. All of my organization's printers are installed and shared there. I have all my workstations pointing to those printers, some installed manually from the AD list and some deployed though group policy.
For some strange reason, every once in a while I will have my workstations asking that there's a new driver that must be installed for certain printers. I am certain that no new drivers have been installed on the print server. I am almost sure that it's not downloading new drivers from Windows Update for two reasons: 1) I have the option for updating device drivers from WU turned off, and 2) there haven't been any newer drivers for that printer since 2009.
What could be causing these workstations (and servers) to want to force the user to re-install the driver?