Is UAC enabled or not? Make sure that it is enabled. Windows 7 Click Start, type User Accounts in the Search programs and files box, and then click User Accounts in the list. Click Change User Account Control settings. Slide the block to change the UAC settings. Note The four options allow you to control how if you are notified when you make changes are made to Windows settings. Windows 7 Click Start, click Run, type msconfig and then press ENTER. On the Tools tab, click Change UAC Settings, and then click Launch. Close the System Configuration window and then restart the computer. Use the Registry Editor to enable UAC <script type="text/javascript">// <![CDATA[ loadTOCNode(4, 'resolution'); ]]></script> Click Start, click Run, type regedit and then press ENTER. Locate and then click the following registry subkey: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\System Right-click EnableLUA, and then click Modify. In the Value data box, type 1, and then click OK. Exit Registry Editor.

I just installed my first Win7 64bit Ultimate desktop into a 2003SP2 Server domain. I created a Standard user account on the domain controller and applied all of the Microsoft security patches from Windows Update to the Win7 PC using the local account that I created during the OS install before I started anything. I joined the domain, and logged into the Win 7 machine using the Standard user account. When I try to install software, I do not get prompted for the domain Administrator credentials (in order to temporarily escalate user privileges). Instead, I just get an error message "You must be logged in with an Administrator account to perform this operation". This error is on Microsoft Office, HP Printer drivers, and anything I try to install. When I logon with the Domain Administrator account, I can install everything. Is there a registry or policy setting on the local machine that determines whether a user can dynamically request privilege escalation?