On Windows 10 the only way to truly disable UAC is per registry.
 Code:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System]
"EnableLUA"=dword:00000000

Or as code:
 Code:
$=WriteValue('HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System','EnableLUA',0,'REG_DWORD')


The slider only drops it to 1, leaving it still enabled.

Edited by Arend_ (2016-09-30 09:42 PM)
Edit Reason: Added reasoning