I have two partitions on a single hard drive. One with Ubuntu and one with Windows 10. Under normal circumstances I could choose either one with a GRUB entry and it would boot that OS without any issues.

Now I try to start Windows 10, and all it will do is show me a blinking underscore in the top-left corner and not boot, even after waiting 15 minutes.

I can still boot Ubuntu just fine.


How can I boot Windows?

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