How to disable the UAC (User Account Control) in Windows Vista, Windows 7 and Windows 8 (temporary or permanent)

The User Account Setting in Windows 8

Have you been asked by a program that you want to install or some other reason to disable the User Account Control in Windows temporarily or permanently than you can do this on this way:

Windows Vista:
- Go to the Start button of Windows
- Click the Control-panel
- Go to User Accounts
- Uncheck it

Windows 7:
- Go to the Start button of Windows
- Click Sharing is sexy