Windows 8 8.1 and 10 all have this annoying ability to re-enable Windows UAC (It happens from Windows Updates). There are 3 ways to disable it, but the 1st is the one that does not stick.
Note: Disabling UAC disables all "metro" Apps.
2 & 3 are really the same, just different methods. Keep the file around in case UAC comes back (Windows "Update.."), or put in Startup. They both require Admin Privileges.
2. Using a NOUAC.cmd
The contents of which are:
echo Y | reg add "hklm\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v EnableLUA /t reg_dword /d 0 && echo Y | reg add "hklm\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v ConsentPromptBehaviorAdmin /t reg_dword /d 0 && echo Y | reg add "hklm\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v PromptOnSecureDesktop /t reg_dword /d 0
3. Using a NoUAC.reg file
The contents of which are:
Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System] "EnableLUA"=dword:00000000 "ConsentPromptBehaviorAdmin"=dword:00000000 "PromptOnSecureDesktop"=dword:00000000
[UPDATE] Redirect to this program >> Destroy Windows 10 Spying. -- Can disable UAC & also can do a lot more, like remove metro apps that can't be used without UAC anyway!