Vista's UAC security prompt was designed to annoy you April 11, 2008, 15:02(EDT) By Eric (a.k.a. TweakHound) At the RSA 2008 confab in San Francisco, Microsoft admitted that UAC was designed, in fact, to annoy. Microsoft’s David Cross came out and said so: “The reason we put UAC into the platform was to annoy users. I’m serious,” said Cross. More at Ars Technica