I complained that User Account Protection (UAC) was "the most annoying feature that Microsoft has ever added to any software product," and sadly, that's largely true today, with a caveat. I do feel that most people will find UAC to be hugely annoying, especially if they take the more secure route and run as a Standard User. However, I also believe that all Windows users should leave UAC enabled, in order to ensure that their system is as secure as is possible. UAC is most annoying when you first set up and configure a new Windows Vista system: That's because this beginning time period is where you install all your applications, and that's exactly when you're going to see the most UAC prompts. You may read reviews of Windows Vista that harp on this problem, but such reviews don't offer a particularly deep analysis of the reality of UAC, which is this: Over time, the number of UAC prompts you need to deal with will go down. And over time, the annoyance of UAC will evolve into acceptance as Vista users discover what Mac OS X and Linux users discovered long ago about similar security controls in those systems. UAC is annoying, yes, but it's not deadly. It may just be one of the most important features in Windows Vista.