Windows 10: How to recover windows product keys

I have a Dell laptop and I have installed the window 10 home Singal language by changing the hard disk and I want to know my original product key. I have used both notepad and PowerShell methods, but the key shows in different in both, and window explorer also shows the difference from them and I am confused about the original key. When I applied in redeem Microsoft account Redeem they show like that " TokenNotFoundIL+Mpk/HNEmNvDzG.0.5.72021/09/16 - 09:14:28 UTCTokenNotFoundXe+JliK7qUm/C4sX.1.0.5.72021/09/16 - 08:31:24 UTCPlease solve my problem that how to find my window original key.

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Finding the Windows Vista product key

Allright,I've tried the Hirens BootCD on USB drive and it works like charms.unfortunately,none of the utilities included on it helped me to recover the vista product key..but thats not important anymore,cos I just did a fresh install in the end..everything works fine,but a new issue arise.
DVD drive not recognized in my computer under Vista
tried few things but no results..what do you suggest guys?

 

Recover Win 10 product key

Incorrect. The OEM Windows 10 Pro key is embedded in the bios. There was no need to buy anything....

Recover Win 10 product key post #15.

 

Need to recover files from my Memory card

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