Windows 7 Product Key not found after upgrade of 10

@abstract 064 0 Reputation points

My windows 7 (activated) recently got crashed so I managed to install windows 10 using usb. i did succeed but windows 10 is not activated. Windows 7 was also Activated but windows 10 upgrade didn't detect my product key, also i cannot find it anywhere. What do I can do, I also cant afford a new lisence to windows 10. Is there any way to Activate windows without purchasing a new product key? Plz help me solve this problem

Windows 10
Windows 10
A Microsoft operating system that runs on personal computers and tablets.
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  1. S.Sengupta 13,286 Reputation points MVP

    Microsoft no longer allows users to activate new installations of Windows 11 or 10 using product keys from older versions, such as Windows 7 and 8.

    The Windows 10 free upgrade through the Get Windows 10 (GWX) app ended on July 29, 2016.

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