Windows boot drive drive gone.

I followed a tutorial on YouTube on how to create a open core Catalina usb, and I wanted to test if it worked so I went into bios, reset to default bios settings, and booted into open core and it worked. But when I wanted to go back into windows and fix a drive I couldn’t boot back into windows, it says reboot and select proper boot drive. Please help!

submitted by /u/Jack_B34
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