Windows 10: Invalid key long after free upgrade win 7 to win 10

I bought a Acer laptop from Taiwan a long time ago. It was a Chinese Win 7 laptop. I went to Acer service center to buy another OEM win 7 English version, which is legal, and Acer installed it. Maybe 6 years ago there was a free upgrade to win 10. I upgraded. Now the windows crashes, so I reinstall a win 10 downloaded from Microsoft mediacreationtool. The problem is, It doesn't recognize my win 7 English version key. That sucks. I upgraded during the free event, so it makes me a legal win 10 user. But how come it doesn't recognize my key!? What should I do? Thank you.

:)

 

SCCM: In Place upgrade Win 7to win 10 1903 License issue

I was working on one task sequence for In Place Upgrade. Win 10 1709 to Win 10 1903 is working fine.

But Win 7 to Win 10 1903 is getting failed during Upgrade Operating System step.

I checked some of the links and added the KMS Client Keys (NPPR9-FWDCX-D2C8J-H872K-2YT43) in upgrade operating system step.

Also added one step to run vbs script.

But Task Sequence is getting failed at this step.

Command line Cscript.exe c:\windows\system32\slmgr.vbs /ipk NPPR9-FWDCX-D2C8J-H872K-2YT43 returned 3221549136

In my environment, we are using KMS and we don't have a Volume license.

Any advise how to resolve this issue.

 

Fresh Install of Win 10 without Serial Key?

Looking to reformat a laptops HDD, and then reinstall Win 10 fresh. The problem is it came pre-installed with Win 8 and I did the free upgrade to Win 10. How exactly would I re-format the HDD, reinstall Win 10 and ensure it reactivates properly? I don't see a Win 8 serial key anywhere in the contents of the box.

 

Recommend hardware changes for upgrading from Win-7 to Win-10

Bree
I followed your suggestions (2nd Aug 19) for installing Win-10. Made the bootable flash drive successfully through the media creation tool. But when I attempted to upgrade and activate to Win-10 (64 bit) from within Win-7 (Pro-32 bit), I got the following error message:

Error # OxC1900101-Ox20017. " The installation failed in the SAFE_OS phase with an error during BOOT operation"

I read the diagnostics under this error number and carried out the proposed fixes, i.e. update Win-7, uninstall Malwarebyte antivirus, disconnect all external hardware, e.g. printer, scanner, external hard drives. I then tried to repeat the steps to do the upgrade through the Win-10 bootable flash drive as before. Got the same error message.
Appreciate any further comments and suggestions as to (a) what does a failure in the SAFE_OS during boot operation mean, (b) what can I do to solve it. Is this anything to do with the hardware in my computer? I listed these in my first posting above.
Thanks for any help