I have been using different linux distribution via virtual box for the past month. Last weekend found an old laptop with a dead hard drive and changed it out for a totally new hard drive, with nothing on it. I usb booted linux mint on to the old laptop, but when I got to the install it kept failing at Grub throwing back an error ".. 'grub-efi-amd64-signed' package failed to install into /target/. Without the GRUB boot loader...."
I tried to use all the online solutions I could but I noticed when I got to the installer screen giving options on how I wanted to install i.e "write over hard drive" "try something else" it provided the option of installing linux mint alongside linux mint. Which made no sense as I couldn't access an actual linux mint that was written to the hard drive (just the live boot, which wouldn't save anything when I shut down). I eventually thought chose the option to install linux mint alongside linux mint, out of frustration. Install worked and when I restarted the machine it gave me Grub with two linux mint options which were both fully installed... Is there a way to change one of my dual boots to something else ? another OS?
TLDR dual booted the same OS (linux mint) by accident. Is there a way to change one of my dual boots to something else ? another OS?