The easiest way to disable UAC (User Account Control) on Windows Server 2019 is to modify the registry key on the server. You may use this reg file to Disable the UAC. Simply, double click the registry file and settings will be imported on the machine. This script can also to be used on Windows Server 2012 R2 and Windows Server 2016. Under certain constrained circumstances, disabling User Account Control (UAC) on Windows Server can be an acceptable and recommended practice (example: consistent backup). These circumstances occur only when all the following conditions are true: Only administrators are allowed to log on to the Windows-based server interactively at the console or by using Remote Desktop Services and administrators log on to the Windows-based server only to perform legitimate system administrative functions on the server.