How to Enable/Disable UAC (User Account Control) in Windows Server 2008

I had a lot of troubles trying to install TADDM 7.2.1 on Windows Server 2008 SR 2, but finally find the right way for do that, the solution is just a copy & paste from the microsoft web site:

Configure User Account Control

Scenario 3 outlines some common tasks that local administrators perform during the set up and configuration of client computers running Windows 7 or Windows Vista. The following procedures step you through the tasks:

1.- turning off UAC,
2.- disabling Admin Approval Mode,
3.- disabling UAC from prompting for credentials to install applications,
4.- changing the elevation prompt behavior

Important 

Advanced configuration options for UAC are not available in Windows Vista Starter, Windows Vista Home Basic, or Windows Vista Home Premium.

1.- Turning off UAC

Use the following procedure to disable UAC.

To perform the following procedure, you must be able to log on with or provide the credentials of a member of the local Administrators group.

Important 
Turning off UAC reduces the security of your computer and may expose you to increased risk from malicious software. We do not recommend leaving UAC disabled.

To turn off UAC

1.Click Start, and then click Control Panel.

2.In Control Panel, click User Accounts.

3.In the User Accounts window, click User Accounts.

4.In the User Accounts tasks window, click Turn User Account Control on or off.

5.If UAC is currently configured in Admin Approval Mode, the User Account Control message appears. Click Continue.

6.Clear the Use User Account Control (UAC) to help protect your computer check box, and then click OK.

7.Click Restart Now to apply the change right away, or click Restart Later, and then close the User Accounts tasks window.

2.- Disabling Admin Approval Mode

Use the following procedure to disable Admin Approval Mode.

Note 
To perform the following procedure, you must be logged on to a client computer as a local administrator.

Important 

You cannot disable Admin Approval Mode on Windows Vista Starter, Windows Vista Home Basic, or Windows Vista Home Premium because secpol.msc is not included.

To disable Admin Approval Mode

1.Click Start, click All Programs, click Accessories, click Run, type secpol.msc in the Open box, and then click OK.

2.If the User Account Control dialog box appears, confirm that the action it displays is what you want, and then click Continue..

3.From the Local Security Settings console tree, double-click Local Policies, and then double-click Security Options.

4.Scroll down and double-click User Account Control: Run all administrators in Admin Approval Mode.

5.Select the Disabled option, and then click OK.

6.Close the Local Security Settings window.

3.- Disabling User Account Control from prompting for credentials to install applications

Use the following procedure to disable UAC from prompting for credentials to install applications.

Note 

To perform the following procedure, you must be logged on to a client computer as a local administrator.

Important 

This procedure is not supported on Windows Vista Starter, Windows Vista Home Basic, or Windows Vista Home Premium.

To disable UAC from prompting for credentials to install applications

1.Click Start, click All Programs, click Accessories, click Run, type secpol.msc in the Open text box, and then click OK.

2.From the Local Security Settings console tree, click Local Policies, and then click Security Options.

3.Scroll down and double-click User Account Control: Detect application installations and prompt for elevation.

4.Select the Disabled option, and then click OK.

5.Close the Local Security Settings window.

4.- Changing the elevation prompt behavior

Use the following procedures to change the elevation prompt behavior for UAC. You can configure the behavior of the elevation prompt separately for administrators and for standard users.

Note 

To perform the following procedures, you must be logged on to a client computer as a local administrator.

Important 

To complete the following procedures, you must be running Windows Vista Ultimate, Windows Vista Enterprise, or Windows Vista Business. You cannot complete the following procedures if you are running Windows Vista Starter, Windows Vista Home Basic, or Windows Vista Home Premium because secpol.msc is not included.

To change the elevation prompt behavior for administrators

1.Click Start, click Accessories, click Run, type secpol.msc in the Open box, and then click OK.

2.From the Local Security Settings console tree, click Local Policies, and then click Security Options.

3.Scroll down to and double-click User Account Control: Behavior of the elevation prompt for administrators.

4.From the drop-down menu, select one of the following settings:

Elevate without prompting (tasks that request elevation will automatically run as elevated without prompting the administrator)

Prompt for credentials (this setting requires user name and password input before an application or task will run as elevated)

Prompt for consent (default setting for administrators)

5.Click OK.

6.Close the Local Security Settings window.

To change the elevation prompt behavior for standard users

1.Click Start, click Accessories, click Run, type secpol.msc in the Open box, and then click OK.

2.From the Local Security Settings console tree, click Local Policies, and then Security Options.

3.Scroll down to and double-click User Account Control: Behavior of the elevation prompt for standard users.

4.From the drop-down menu, select one of the following settings:

Automatically deny elevation requests (standard users will not be able to run programs that require elevation, and they will not be prompted)

Prompt for credentials (this setting requires user name and password input before an application or task will run as elevated, and it is the default for standard users)

5.Click OK.

6.Close the Local Security Settings window.