If you run a “locked down” group policy model and need users to add new network and local printers to their machine without being Local Administrators you will need to configure the below group policy.
This will stop the UAC Box in Windows 7 coming up and asking to administrator permissions to run “C:\windows\system32\NtPrint.exe”. This can be applied through a domain controller via a networked group policy or locally using gpedit.msc
In Windows XP this setting is configured in
User Configuration -> Administrative Templates -> Control Panel -> Printers
However in Windows 7 this setting is configured in
Computer Configuration -> Policies -> Administrative Templates -> Printers : Point and Print Restrictions
N.B. If you want to deploy the below group policy you will need to have your Domain Controllers up to the 2008 R2 Schema or use this tool to Modify the Windows 7 Policy
http://blogs.technet.com/b/iftekhar/archive/2009/08/13/remote-server-admin-tools-rsat-for-windows-7-now-available.aspx
You need to set Point and Print Restrictions to DISABLED