I am a Systems Engineer. I cannot connect to Network Printer from Windows 7 with "Run only allowed Windows Applications" applied in a GPO. This works fine on the XP Desktops. I have tried adding all exe and dll libraries that could possibly be associated with the Background Process of adding a Network Printer e.g. Printui.dll, winspool.drv etc. I am getting the following error: "Operation has been canceled due to Restrictions in effect on this Computer". I have also tried to use Process Monitor due capture the process while installing the Printer as a Test User with no restrictions applied but I cannot see anything out of the ordinary.