I just ran into a almost funny situation. I was installing Vista on my home desktop and as it was installing, I realized that I will have this issue.
I only have and use a bluetooth keyboard with my desktop. As the OS was upgrading from XP to Vista, it lost the bluetooth settings. Once the install is the complete, the first thing you need to do is to create your user account. Well – this is a little hard, maybe impossible, to do if your keyboard is not working…. so now I have to go borrow a keyboard from a friend or neighbor, complete the install process and register my bluetooth keyboard.
Annoying, funny and sad to say the least. I realized this half way through the install, and prayed that Microsoft guys (who are obviously smarter then me) would have thought this through.
Microsoft guys – I hope you take care of this use case in the Windows 7 upgrade installs 
but then.. u don’t read my blog, so will never know that I had this issue. And of course, no one else has ever faced this or complained … right? …..
