I'm managing a domain with roughly 450 clients, all running Windows 7 Ent x64, and about 50 printers. All clients have the same desktop image with the exception of a few desktops need special additional software. I push out printers via GPO and it was running fine until recently. The client pc would reset it default printer every time the pc reboot or log off. First, there was only a handful and now it spreads to almost half the number of pc are being effect with this problem. I've tried different approaches, even completely rewrite the GPOs with no success. The pc would reset to either PDFCreator or OneNote or XPS or Fax. I found that if I re-image the client desktop the default printer would remain default but I'm keeping that as the last option since it involves with data migrating and probably consumes a whole lot of time (200+ effected pc). Any leads or suggestions are much appreciated, my clients are not happy and they are chewing me alive :)
I must add that setting default printer via GPO is not an option for me since people with different groups or branches are sharing the same building/floor.