Windows 10: Forgot Win 11 Pro Product Key

Forgot Win 11 Pro Product Key

:)

 

Why was I not asked for a product key when upgrading to Win 10?

According to your spec you have Win 10 Pro, but perhaps that doesn't reflect your PC.

You haven't stated which edition of Win 10 you have on this machine, nor what your Win 10 key is for.

For example, if you already have Win 10 Pro and your key is Win 10 Home, that would be a retrograde step.

For interest only:
Change Product Key in Windows 10

More on product key if you search this list or look at 'Related Tutorials' in the above.
Windows 10 Tutorial Index

 

Win 10 Pro upgrade using Win 8 Pro product key

I just bought a new computer running Win 10 Home. When I went to upgrade to Win 10 Pro using my Win 8 Pro product key from my old computer, the upgrade wouldn't activate.

Now I'm stuck with a bunch of error messages (mainly 0xC004C003) and am being told windows isn't activated. I can't seem to get my activated Win 10 Home back.

I don't have a product key for the Win 10 Home because it came pre-installed. There's no product code recorded on the packaging or labelling on the device.

So:

How do I either

• activate the Win Pro upgrade, or
• Get my activated Win 10 home back?

 

new fresh install of Win 11 Pro - but will not activate with my Win 10 Pro Product Key

Win 10 Pro to Win 11 Pro. Activation: not. Troubleshooter: no help whatever. Gives generic error 0x803fa067. No help on MS web site (used to be a phone call for Activation issues, but no more). Used that W10-Pro Product Key (retail CD purchase) since 2017, activated no problems ever, even after fresh re-installs and hardware changes.

Repair does naught but waste an hour and No Activation fix.

There is no solution, other than that the MS web site (see above) is incorrect: one cannot do a fresh install of Win 11 and expect activation using a legit Win 10 Product Key. Please change the info on the web site!