User Account Control (UAC) is the security of the latest released Microsoft Windows Vista by limiting application software to standard user privileges until an administrator authorizes an increase in privilege level.


But in the actual scenario in real time the user using Windows Vista may feel that this UAC is an obnoxious, nagging popup window that will keeps on irritating in frequent intervals of time (installing applications, changing privileges etc).

But this annoying UAC can be easily disabled using windows Command Line

Enable UAC:

C:\Windows\System32\cmd.exe /k %windir%\System32 eg.exeADDHKLM\SOFTWARE\Microsoft
\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f

Disable UAC:

C:\Windows\System32\cmd.exe /k %windir%\System32\reg.exeADDHKLM\SOFTWARE\Microsoft
\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 1 /f


After you enable or disable UAC, restart the system once.

NOTE: Disabling UAC will lead to a less secure system, so be warned.