I installed Zorin alongside Windows 10 on my Acer laptop and its been working fine for about 2 years now. Everytime i power up the laptop it boots straight into Zorin and it shows the option to boot windows if i want to.
However, today i wanted to try Batocera and flashed it on a usb stick. I tried to boot from the USB stick but i got a message i've never seen before. Something along the lines of "security boot failed" with an exclamation mark icon. After hitting Enter, this message disappeared and the laptop booted into Windows 10.
I ejected the USB stick and then tried rebooting the laptop but it just keeps booting into windows as primary. I've been into Boot menu and cannot see Zorin. it has Windows boot manager as primary and then "toshiba.." something as secondary and a few others. I've reordered the boot priority so many times and even placed the Windows Boot Manager at the bottom and still cannot boot back into Zorin.
I've checked my disk partitions and cannot see Zorin on any of them. What should i be looking for?
Please help as i can't see any of my zorin files through Windows and i have all my work related stuff in there.