Windows Vista - http://www.vistaarticles.com
Cannot Perform Task that Requires Elevated Administrator Rights and Permissions
http://www.vistaarticles.com/articles/282/1/Cannot-Perform-Task-that-Requires-Elevated-Administrator-Rights-and-Permissions
By 
Published on 12/10/2006
 
When you log on to Windows Vista as a standard user, and you try to perform a task that requires elevated administrator rights and permissions, you encounter unexpected behavior. Additionally, one or more of the following symptoms may occur.

Cannot Perform Task that Requires Elevated Administrator Rights and Permissions

To resolve this issue, follow these steps to turn on the User Account Control feature.

Note Because there are several versions of Microsoft Windows, the following steps may be different on your computer. If they are, see your product documentation to complete these steps.

1. Log on to Windows Vista as a user who has administrator rights and permissions.
2. Click Start, and then click Control Panel.
3. Click User Accounts and Family Safety, click User Accounts, and then click Turn User Account Control on or off.

Note In some versions of Windows Vista, User Accounts and Family Safety does not appear. Instead, click User Accounts, click User Accounts, and then click Turn User Account Control on or off.

 If you are prompted for an administrator password or for confirmation, type your password, or click Continue.
4. Click to select the Use User Account Control (UAC) to help protect your computer check box.
5. Click OK.
6. When you are prompted, restart the computer.
After you follow these steps, the User Account Control window appears when any user tries to perform a task that requires elevated administrative rights and permissions.