How to Disable UAC (User Access Control) Easy way

User Access Control is that annoying thing that keeps on popping up tirelessly
to ask you if it is OK to install a particular program when you try to install one. It is one of the biggest irritants in Vista, but we must warn you that disabling it will render your system less secure. Open the Control Panel, type in user account in the search box, and press [Enter]. You’ll see the link for Turn User Access Control (UAC) on or off. Click it. Uncheck the box, reboot your computer, and you will no longer be bothered by UAC. There is an even faster way to disable UAC from the command line:
C:\Windows\System32\cmd.exe /k%windir%\System32\reg.exe
ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /vEnableLUA /t REG_DWORD /d 0 /f
For the security-conscious, we suggest an alternative method. In this one, only the UAC of the Administrator account is disabled; other users will go through the same security mechanism as before. Open the Registry Editor and
go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
Create a 32-bit DWORD
ConsentPromptBehaviorAdmin and set its value to 0. Restart. What actually happens here is, you elevate the privilege level for the administrator.