Problem: You are trying to install a certain application on a computer, but the application fails to install. There is no specific error message or log entry that indicates the problem. However, you notice that when you disable UAC on the computer, the application installation succeeds.
Resolution: Don't disable UAC on the computer. Instead, launch the application's install program (.msi) from an elevated command prompt.
Mitch Tulloch is a seven-time recipient of the Microsoft Most Valuable Professional (MVP) award and widely recognized expert on Windows administration, deployment and virtualization. For more tips by Mitch you can follow him on Twitter or friend him on Facebook.