Referencing Cannot boot from USB - sole edit added by moderator
I’m having the same problem with my Toshiba Satellite C50-A and I can confirm the issue (in my case) is the UEFI. My Win7(64) is CSM, so if I switch the BIOS to UEFI, Zorin will boot but Windows will not. If I switch back to CSM, Windows will boot but Zorin will not.
Someone else I found only needed to reset his BIOS. If you haven’t already ruled it out, it’s worth a try: https://superuser.com/questions/1432795/usb-not-booting-and-bios-correctly-set
It is progress to have narrowed down the problem this far, but I’m not sure changing the BIOS every time I decide to switch OS is really workable in the long-term.
I also found this - https://www.plop.at/en/bootmanagers.html - but I can’t tell from the information given whether it will work for what I’m doing.
Everything I’m finding indicates that changing Windows to UEFI requires wiping the drive, which defeats my purpose in using a USB bootable drive in the first place. Is there a way to switch Zorin to CSM on the USB?