I've been using Win7 since it was first made available to the public and received a free copy of Ultimate for hosting a Win7 party. It's an excellent operating

I've been using Win7 since it was first made available to the public and received a free copy of Ultimate for hosting a Win7 party. It's an excellent operating system but yes, there are a few things that seem to get in the way. Nonetheless, just as you said Leopard is highly configurable and you can make a few modifications to get it exactly as you like it, the same could be said for Windows 7. It may not be as simple (have to hit the registry, or download an app to do it for you), but it's possible. In regards to the reboot issue, I've never experienced that one (although the continued asking every 15 minutes gets annoying). What probably happened is you were busy typing away and the window came up, just a few keystrokes in that window and you told it to reboot. Definitely a problem - that window, being as destructive as it is, should never be the active window when it pops up. But, I'm pretty sure you can disable that window (I thought there was a "Don't ask again option" in the window itself) through a variety of means: registry, telling security center to only install updates at 2AM, etc.