To disable User Account Control (UAC) via Group Policy (GPO) configure following GPO policies:

• Computer Configuration > Windows Settings > Security Settings > Local Policies > Security Options
• Behavior of the elevation prompt for standard users – Elevate without prompting
• Detect application installations and prompt for elevation – Disabled
• Only elevate UIAccess applications that are installed in secure locations – Disabled
• Run all users, including administrators, as standard users – Disabled

Windows Small Business Sever (SBS) 2008
Windows 7 Pro