
I always felt it was a failed attempt at US propaganda, because my take away from that movie was: Americans come in. Don’t know shit about the local people and their customs. Get overwhelmed. Run away with their tails between their legs to their base and fuck off.
It’s kinda like the movie “Aliens”.
Once you understand how the Linux bootloader works, restoring it is easy if windows breaks it. The other way around is more tricky if windows refuses to cooperate.
That being said, using a rescue usb like systemrescuecd will allow you to boot a Linux OS even if the bootloader isn’t working properly.