After having some bad experiences with Windows 10 network (as in even with updated drivers, connections are half speed what a Linux live boot can achieve) I decided to dual boot my laptop to test Ubuntu from the SSD.
Lucky I had created a Windows 10 image and a repair boot USB key before that. Installed Linux but unless I press the ESC key and go into the BIOS config to select which partition to boot from, it goes into a boot loop - and even so it only boots from Ubuntu, Windows will just restart the laptop.
I was expecting grub to show up and give me the option of loading either Windows or Ubuntu.
At the end I just used the recover USB key to boot and reload the Windows image backup, blowing all the boot and partition information created by the Ubuntu install.
Perhaps something else should be changed if using UEFI?