Windows UAC Manager is a free command-line tool to enable or disable User Account Control (UAC) quickly.

User Account Control (UAC) is a security feature (Vista onwards) that enables users to perform everyday tasks as non-administrators and as administrators without having to switch users, log off, or use Run As. It works by prompting for permission when a task requires administrative rights, such as installing software or changing settings that affect other users.

But sometimes it becomes annoying to keep waiting and hitting on these prompts at times for an elevation of the user rights. In such cases, Windows UAC Manager can help you to quickly and easily disable UAC temporarily then enable it back again.
It automatically checks for the current status of UAC and then enables/disable it accordingly if necessary.

Windows UAC Manager is a simple & easy to use app. Also being a command-line based tool makes it perfect for automation.