One of the missing things from Windows Vista that most perplexed me (or frustrated the monkey cr*p out of me) was the lack of the RunAs shell extension. Following proper administrative best practices, I don't log in to my laptop with domain administrative privileges, I have a separate account for that. Running something like ADUC was never easy, and UAC in Vista often got in the way. If you turned it off, you could not get prompted to run an application under a different set of credentials. You could set it under the local security policy to always prompt for credentials, and then enter your other set of credentials. of course, then you get prompted to enter your credentials for everything under the sun. Its a good security practice, but boy does it get old quick. Very quick. This utility returns the traditional right-click RunAs functionality to the explorer shell. Enjoy. Rejoice.