So I was/am trying to install Ubuntu to dual boot Windows and Ubuntu together, but while trying to do so, I went into the BIOS and I believe I changed the boot menu to Legacy - I think it was a drop down from UEFI to Legacy. Anyways, when I restarted it, I now get the Client Mac Addr (no post screen). Thankfully, I had Ubuntu on the flash drive and it went into installing that. After this was installed, I re-formatted the flash drive to fat32 again and re-downloaded the Windows 10 iso file. I added all the partitions and everything (even did a work-around since the win file was too big for a fat32), but I still can't get into a Windows 10 set-up or the BIOS to change the boot menu back. I continue to launch into the Client Mac Addr screen every time I restart and then eventually it says,"no boot file name received" and launches the grub boot menu. All I have in there are a bunch of Ubuntu files, memory test files, and a Windows recovery file that turns up an error when I go into it.
I am hoping my PC is not entirely screwed as I have some files on there, but I think everything was backed up via OneDrive.
Does anyone have any recommendations on what to try (other than Ron Swansoning it into the dumpster)?
The laptop is a Dell Inspiron 15 7000 Gaming Laptop.
**** EDIT: After running Ubuntu boot repair,
$sudo apt-get install -y boot-repair && boot-repair
I get this message, "WindowsEFI detected. Please disable BIOS-compatibility/CSM/Legacy mode in your UEFI firmware, and use this software from a live-CD (or live-USB) that is compatible with UEFI booting mode. For example, use a live-USB of Boot-Repair-Disk-64bit (www.sourceforge.net/p/boot-repair-cd), after making sure your BIOS is set up to boot USB in EFI mode."
Does anyone have any ideas how to fix this and get into the bios??