User Account Control bug?

Before I updated windows(using windows update), the intervals between the
desktop fading and the allow/cancel interface was just between 1-3 seconds,
after I updated windows, the screen goes blank for 10 seconds then the faded
desktop appears, after I click allow/cancel on the interface, it takes
another 10 seconds for me to get back to the desktop.... anyone experienced
this or has a solution to this?




- p.s. I already installed Service Pack 1 and it did no good