I have a Dell XPS 15 (9560) that came preloaded with Windows 10 Pro. I used a bootable Ubuntu 18.04 USB to run Ubuntu through the USB, then I used Gparted and wiped the hard drive clean (SSD 1TB), after which I installed Ubuntu 18.04 as the only operating system on the machine. I have been using Windows 10 in Virtualbox within Ubuntu for some time, but I now need to use some labor intensive programs that I believe require installing Windows 10 on the hard drive in another partition to work better.
I created a Windows 10 USB using rufus 3.0 which formatted the USB as a FAT32 (Large). When I entered the boot options upon startup, the computer failed to see the see the USB drive (UEFI boot options). I am assuming that I am missing a Windows Booting tool of some sort that would allow me to see this usb drive and boot to it.
Long story short, I have loaded an Ubuntu bootable USB now, and have completely wiped the hard drive and created one large partition formatted as NTFS in order to do a clean install of Windows and then install Ubuntu as a dual boot rather than trying to install Windows after Ubuntu. I am now left with a completely empty hard drive with one primary partition formatted as NTFS. I am still unable to see the Windows 10 bootable USB in my boot options.
In my bios settings, the boot sequence is set to UEFI and the only boot option that appears is "ubuntu".
Under "Advanced Boot Options", neither of the "Enable Legacy Option ROMs" or "Enable UEFI Network Stack" boxes are checked.
"UEFI Boot Path Security" is set to "Always, Except Internal HDD".
Under "System Configuration" I have the SATA Operation set to AHCI.
Secure Boot is disabled.
When I plug in my Windows 10 bootable USB and start the computer and enter the boot option menu, I still fail to see the bootable USB in my UEFI options. However, I am able to see the Ubuntu bootable USB just fine and even load to it.
The bottom line is, I know that this isn't strictly an Ubuntu question, however, I figure that someone on here has run into this problem before and knows a solution. I intend on installing Windows, then installing Ubuntu on a separate partition like I probably should have done in the first place. Thank you for any help you can offer.