My corporate IT (Exchange Server) enforces security policy on all mobile devices that connect to it. So my phone is locked by a PIN. When I connect the Windows Mobile Phone (HTC S710) to PC, Vista displays a dialog box (like the one below). This dialog box certainly has useful information that needs my attention, but I am irritated on the fact it doesn't have a minimize/close button. Absolutely no way to get rid of the window other than keying the PIN in the device or disconnecting the device.

I feel this to be a classic case of bad user interface design.