Bootcamp partition no longer available?

I just got a new computer (MacBook Pro) and downloaded Windows 10 using Bootcamp about a week ago; today I downloaded Parallels 11 and everything works as a virtual machine but I went to restart in Windows through Bootcamp and the option is no longer available.

I will be needing to run only Windows at times because I have downloaded and will be using very intensive softwares (AutoCAD suites, Rhino 3D, etc.) on the Windows side. Is there a way to get the option back of restarting in only Windows?

(I start school next week and would very much like to get this problem solved before then so thank you in advance!)

 

Hello ErinF,
Please provide us more information regarding the trouble
1] Are you able to boot your Windows 10 OS using Parallels Desktop?
2] If yes, then please try to turn on or restart your Mac -> Immediately press and hold the Option key -> Use your mouse or trackpad, or left and right arrow keys to select the volume you want to use -> Double-click or press the Return key to start up your Mac from the volume you selected.