Windows 7 User Account Control

One of the most fiercely criticized features of Windows Vista is the User Account Control (UAC). Whenever a system-level change is made, Vista’s UAC displays a dialog box prompting the user to continue or stop. This happens regardless of whether it is a program that is making the changes or the user herself (even though she might be logged in as an administrator). And with the frequency that the UAC displays prompts, most users find it a nuisance rather than a useful security alert feature. Moreover, when the user ends up with too many UAC prompts, it actually defeats the purpose, as users simply give their permission without reading the prompts.

In Windows Vista, Microsoft only provided two options to control UAC—turn it on or turn it off. In Windows 7, Microsoft has fine-tuned the UAC so that you can choose when to be notified if changes happen.

To configure UAC, go to Control Panel and select User Accounts and Family Safety, and then select User Accounts. Click the Change User Account Control settings link.

Notice that you now have four levels to specify how you are notified when changes are made to your computer.

The four levels are:
• Always notify when programs install software or users make changes to the computer. This is the most naggy option, as all changes require the permission of the user (this is the option used by Vista).

• Notify only when programs make changes to the system. When the user makes changes to the Windows settings, there will be no prompting. This is the default level selected by Windows.

• Notify only when programs make changes to the system without desktop dimming. When the user makes changes to the Windows settings, there will be no prompting.

• The user is never notified. This option is not recommended.

When you select a particular notification level and click OK, you will be prompted to confirm the selection.

Source of Information : Oreilly Windows 7 Up and Running