eddyjay Have both Solus OS and Windows 10 partitions in Boot mode (not UEFI), but only shows the Solus OS partition in grub boot. I've tried "sudo pudate-grub" but it doesn't change anything.
bigrammy eddyjay A word of warning!! You wont find your Solus if you boot Windows 10. It can corrupt your ext4 partitions as I found out just recently. 😅 This issue should be a massive sticky as it cost me all my data on a 1TB ssd!! Turns out it is fixable but I did not know that at the time. (You must get the search term just right which I did not in my panic.) I've had no cause to boot Windows 10 for a year or more. I did need it just recently so I booted into Windows 10 without a care as I've done many times prior BUT since the last time I did the Linux Kernel has been updated many times. It's not really Windows fault this time but something to do with the Linux Kernel as dual booting never affected my Solus SSD installation before. Make sure to Remove/Uninstall ext2fsd in Windows 10 if you want your newer Solus and other newer Linux distro to be safe. My old Ubuntu install was fine and unaffected but Solus was toast. Have a read of this for fuller info just wish I had seen it before formatting my ssd. https://askubuntu.com/questions/849872/how-can-i-prevent-windows-10-from-corrupting-the-ext4-superblock-every-time EDIT: (Grammar and spelling)
