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How to change boot options permanently (Win 10 not being default)?
I am trying to have my computer boot Linux by default, from an external hard drive, while my internal drive has Windows 10 on it. Unfortunately I cannot get it to work: Windows 10 boots automatically at every restart and cold start.
Steps I've taken so far:
The boot order I want is set and saved in BIOS. There's no uEFI on my computer.
Windows 10 fast startup option is disabled. I also disabled the hibernation option just in case.
Still, I can only get Linux to boot by going into BIOS every time and selecting the (already selected) external hard drive again. When I then try to mount the internal (Win 10) disk from within Linux, I get an error saying it cannot be mounted because Windows 10 is still using it.
Any ideas how to solve this and give full boot control back to BIOS?