I have windows 8, but not pro. This is one of the first things I disabled after installing windows 8. One mine go control panel > power options> on the left of page, choose what the power buttons do>at bottom of page, shut down settings> uncheck Turn on Fast Startup. If this is grayed out you may have to look at top of last page and click on> change settings that are currently unavailable. slybo
Note, I believe this is what you mean by quick boot