This message was posted on behalf of Intel Corporation
Thank you for joining the Intel Community Support
Yes, it is possible to have a dual boot Windows and Ubuntu System. It is worth ensuring that your Intel NUC is running the latest BIOS update.
-You can review the instructions here.
-BIOS Update: Version: 0047 (Latest).
Here are some instructions that you may take into account when setting up a dual-boot.
-How to setup your computer to dual, or multi-boot Ubuntu, with another instance of Ubuntu, and additional operating systems.