Amazon's Unbox software does something even worse on Vista. For some reason I can't figure out, it will only run once--on the next boot, it fails to start. That would be fine, except it tries to start again, and Vista pops up one of its "application has encountered an error and will be closed" or whatever...and Unbox tries to start again. Infinite loop. Since the Vista popup steals focus and cannot be ignored, the system has to be rebooted, and the app has to be uninstalled before the infinite loop kicks in.
I'd been led to believe that constant rebooting was a thing of the past in Vista...I think I reboot this box more than the XP install on my gaming system.
Vista is the worst computing experience I believe I've ever had. (And I've been using Linux as my primary OS since 96, when there were like five well-supported pieces of hardware, and I've also used every Windows since 95 in my life as an IT support contractor. I think many would say that Windows ME was the worst, but now I'd have to disagree. At least all of the drivers from 95/98 worked on ME.)