Windows 10: Windows deactivated after changing hardware. Using windows 10 that was upgraded from 8.1....

I replaced some hardware on my computer and when I booted it up, windows become deactivated. I have windows 10, but not a key for it since it was the free upgrade they rolled out for windows 8.1. If I try to renter this key, I get an error about invalid key and stuff.Error code: 0x803FA067 is what I get on the activation tab of settingsAnd error code: 0x800705020 is what I get when I try to run the troubleshooter.I'm not sure how to go about solving this. Do I just have to buy windows 11 at this point?

:)

 

Windows 10 Hardware change

windows 10 accepts win7/8 keys *Smile

Tom's Hardware: For The Hardcore PC Enthusiast

 

Unlocked Realtek HD Audio Drivers Windows 7 & 8 (With Dolby Digital Live and DTS Interactive)

DTS supported natively by Windows 8/8.1 and it should work on windows 10 too just DDL require to unlock your driver .

 

Windows 8 Pro Retail => Windows 10 Pro (Free upgrade) Fails Activation after hardware change

Hi,

I bought 2 retail licenses (one for my desktop and one for my laptop) for Windows 8 several years ago and upgraded to Windows 10 (via the free upgrade). Recently I had to change some hardware (motherboard) and I get the following error code when trying to
activate Windows: 0xC004C003.

I have tried the following, all of which have failed.

1. Troubeshoot -> I recently changed hardware on this device (I can only see my Laptop License and not my desktop)
2. Provided the Installation ID (via phone helpdesk) on two occasions.

First help desk technician suggested I buy a new Windows License and the second suggested I reinstall and use Windows 8. Both suggestions from help desk are ridiculous.

How do I proceed without having to:

1. Pay for a license I should technically already have
2. Downgrade back to Windows 8 (loose time / data)