Windows 10: Unable to Activate Windows?

I had purchased a windows 10 usb from Best Buy a couple years ago and still have that USB but lost the cd-key inside the box. I believe I had reformatted my PC and am now getting the Activate Windows request.

I spoke with Windows Support to try to resolve it (maybe purchasing a new cd-key to get rid of this error) but they said i'd need the one assigned to my motherboard and I think they mentioned having to do a fresh install.

Is there a way around this? I don't mind paying money if necessary to get rid of the error. I'd rather not do a fresh install though.

submitted by /u/Aerodlol
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:)

 

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