windows 10 and linux

[Linux for blind general discussion]

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Kristoffer Gustafsson
Salängsgatan 7a
tel:033-12 60 93
mobil: 0730-500934
Hi.
I'm trying to install debian on my windows 10 machine.
But it doesn't work. I install debian and grub in the master boot record.
When installing linux this works, but now I can only get windows to boot.
it seems like grub is not installed.
what shall I do.
help please.
/Kristoffer