I’ve never personally experienced that. But it’s been Windows replaces the bootloader which is typically grub with their bootloader and Windows’ bootloader doesn’t default to letting you choose your OS like grub does.
So when you update Windows and restart, it has reset the settings for the bootloader as their own default bootloader which defaults to Windows. You then need to go in and replace grub as the default bootloader so you can once again select your OS.
I’ve never personally experienced that. But it’s been Windows replaces the bootloader which is typically grub with their bootloader and Windows’ bootloader doesn’t default to letting you choose your OS like grub does.
So when you update Windows and restart, it has reset the settings for the bootloader as their own default bootloader which defaults to Windows. You then need to go in and replace grub as the default bootloader so you can once again select your OS.
Anticompetitive behaviour from microsoft??? gasp
No, Windows is just setting the computer up for users who don't typically change anything in the bootloader.