I have recently tried to install application that require UAC to be disabled, I am using Windows Server 2012 R2.
I have launched “User Account Control Settings” from the control panel and selected the lower level.
I have restarted the Windows, even that it didn’t requested but I realized that it is still disabled, so I found on one of the articles that you have to disable it manually using the registry modification.
Just change value of EnableLUA from 1 to 0 in "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system".
We can use command line for not opening the registry editor by typing the command below:
reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system /v EnableLUA /t REG_DWORD /d 0 /f