I'm having the same problem with HP installations being canceled. I just recently purchased this laptop with Vista Home Premium x64, but I'm still used to XP. I haven't had the time to get all of the Vista tricks down.
I was following the steps recommended above, to change the Privilege Level so that the updater runs as Administrator, but the option is grayed out.
I am the only user on this computer and should have full administrative privileges, so I'm not sure why I wouldn't have that option. UAC has been disabled.
Anyone have any additional suggestions for a Vista noob?
I may stick with the Windows updates like some have suggested, but it bothers me that I don't have the ability to run something as administrator when I *am* the administrator.