This error occurred in Lightroom 2.7 when upgrading the Machine to windows 7 pro on a domain.
If your on a domain and having issues printing from a specific program using Windows 7, first try loggin in as a Domain Administrator to see if the error continues. This will let you know its the user account and lack of necessary privileges causing the error. I was able to resolve the issue by using RIGHT+CLICK on the program and selecting RUN AS ADMINISTRATOR
If this fixes your printing problem, you can set the properties of the program to automatically RUN AS ADMINISTRATOR every time by default.
Find the exact .exe file in program files or right click on the shortcut you use and find the target path.
- Right click on the .exe file and select COMPATIBILITY.
- at the bottom where it says PRIVILEGE LEVEL, Check RUN this program as an adminisrator.
- If your on a domain, click the button that says CHANGE SETTINGS FOR ALL USERS, and repeat the previous step.
It might have a popup asking you to confirm access to the program each time you load, so just hit yes or continue.