This is bizarre because your computer does not provide any reason to why it is not booting up. As a result, I am not exactly sure how to help you. In any case, we will figure it out somehow. I recommend you back up your data before proceeding any further. It is better to be safe than sorry.
I suggest entering the BIOS (F2 during POST). Click on Boot from the left-side menu. In the Boot priority order, make sure Windows Boot Manager is the 1st entry. If you made any changes, then click on Exit Saving Changes
Have you tried some of the other Advanced Options? If you have not already, I suggest trying Startup Repair first.