Occasianlly after a reboot, a couple of my Control Panel items will display a blank white screen and say "The Page Failed To Load" right in the center. So far the only quick fix I have figured out is to kill the explorer.exe process, then restart it. All is will after that. This is a full retail install of Vista Ultimate x64, none of that vLite stuff. All the default services are on.
Here is a SS of what I see: