Cannot override UAC on the remote PC
You cannot remotely interact with a UAC prompt window on the remote screen when you are being connected using the Agent module.
User Account Control (UAC) is a security subsystem/infrastructure in Windows Vista/7 that shows you security warnings whenever your actions require administrative privileges.
If the current Windows user on the remote computer is not an administrator, you need to enter admin credentials in a UAC prompt window before you can perform certain actions (e.g. install software).
Use the Restart Agent as command in the Full Control mode toolbar menu. You must know administrator credentials for the remote computer.
If the Agent is being already run as an administrator, you should be able to control UAC prompts without additional commands.
Alternatively, you can install the Host module on the remote PC. The Host allows you to control UAC prompts right away.