On Windows Vista with User Account Control enabled, when you right-click a program and select Run as Administrator, the elevation prompt contains a particular snippet of warning text and a corresponding color-coding. Here are what the four colors mean.

You can learn about the philosophy behind UAC in this Channel9 interview. Pre-emptive snarky comment: “UAC sucks!” The purpose of this entry is not to discuss whether UAC is a good idea or not. I’m just trying to help by providing information on what the colors mean. This is one of the entries that I was afraid to write. On its own, it’s useful information, but I anticipate a torrent of nasty comments from people who see it as an opportunity to start flaming. I have other tips and stories related to controversial topics; this is a trial balloon entry. If I get a bad experience from this entry, I’ll delete the others. Just like how I deleted all my stories about Bob.

Update: Okay, just to make it clear (since I’m told that people don’t read other comments before posting their own). I did not work on UAC. If you ask me a question about its design or how it works, the answer will be “I don’t know.” That’s why I included a link to a talk from the people who actually know something about it.