Hi Ellen Sturtevant,
Since the keyboard was purchased only yesterday and has never worked, even in UEFI, at this point, I would recommend contacting the retailer first and requesting an exchange under its return policy. This is usually faster and more appropriate for a brand-new item that was defective out of the box. Please keep the receipt, original packaging, and the keyboard’s serial-number label.
If the retailer cannot assist, you can check the warranty and start a service request through the official Microsoft account Devices page. If the keyboard is not listed, register it using the serial number printed near the magnetic connector.
There should be no need to reset or reinstall Windows again, as the keyboard is also not detected in UEFI.
Please note that this is a user-to-user support forum. Moderators, contributors including external Microsoft employees cannot directly intervene in Microsoft product features or access back-end systems. My role is limited to providing technical guidance on reported issues, requests, or ideas. Thank you so much for your understanding.
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