9 of 47Image
Windows setup takes a different approach in Windows 8. Instead of asking you to do little bits at a time like Windows XP or even recent Windows 7, it will bulk together as much as it possibly can into one simple step or steps, to allow you to get on with your day as it completes its job. In this case, as setup is being run from the desktop, it needs to restart.
Setup will automatically start again, or if it doesn't, you can restart it manually -- but it remembers where you left off, saving you from doing it all over again. This step isn't necessary, but it does give the end user peace of mind.
The checkboxes appear and it's clear as to what is going to happen next. At this screen, Windows wants to be left alone to its own devices (pun intended) so it can carry on installing the next version of Windows.