'Choose an operating system' screen shows no options

F

Frederick073

I've install windows 10 (dual booting with 7) so i can use my old laptop with work networks, but after setup and reboot I get to a blue screen that says choose an operating system, but the unfinished windows 10 and my perfectly working 7 install don't show up. Instead the screen is just blank (see attached picture). If I click change defaults or choose other options, the timer and default OS both say '%1'. Is there a way I can recover my windows install without erashing the hard drive? (Troubleshoot menu also turns out blank)I should probably mention that I'm using Tiny10 because 22h2 is too b

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