From Super User:
I just installed Win7 on my non-PC (ahem) and was struck by how many times the Windows installer reboots during installation. It even tells you on the screen during installation that the computer will reboot multiple times.
I know MS must have a good reason for this, but I'm completely baffled why this is necessary? Installation simply writes to the disk, and because the system has booted off the DVD, it already has full write access to the target hard drive partition. Is Windows in fact installing a preliminary disk image and then booting off of that instead of the DVD in order to speed up installation? (Though that then begs the question, why 2 reboots?)
Edit: Changed "3+ reboots" to "2 reboots". It probably seemed like more than that because I had to do an extra reboot initially (back to my host OS) to fix the format of my partition, and then there were the subsequent reboots for windows updates.
(Emphasis added by me)
It seems to me like "raises the question" would fit better than "begs the question" in this case. What is correct?