Windows 10: I am unable to reactivate windows 10 Pro linked to my MS Account after hardware change

Have upgraded hardware, have tried troubleshooting but am unable to reactivate my windows 10 Pro linked to my MS Account need help

:)

 

Motherboard change unable to reactivate Windows 10 Pro -

I have searched this topic and everything seems to be almost a year old. This is a homebuilt machine circa 2015. It started with an ASUS FM2+ motherboard with an AMD A5600K processor. It was Windows 7 Pro, upgraded to Windows 8.1 Pro then to Windows 10 Pro.
Saturday the motherboard died. An exact replacement could not be located so a Gigabyte card was installed. No changes to the hard drives. Booted the machine and Windows automatically started and then did a "revert" then installed the latest updates. C Drive was in the red so I deleted all of the old install files using Windows Clean-up. Went to reactivate, checked the significant hardware change and entered my MS account information - The computer (none of my computers) were listed and now it is telling me that I have to spend $200 to buy a copy of Windows 10 Pro.
Have not yet called Customer Support as the computer is at home and I work during the day -
I do have a disk image or two that may be a year old -

Suggestions - should I just shell out the $200 and move on

TIA

 

Motherboard change unable to reactivate Windows 10 Pro -

Activate using windows 7 pro key.

 

Unable to reactivate Windows 10 after hardware change

Hi there,

I recently upgraded system hardware including Motherboard and am unable to reactivate Windows 10 via the activation troubleshooter:

I have tried removing my old PC configuration from the list of devices in my windows account but still no luck!

• My windows account was linked to my PC prior to the change
• Login in / out of my windows account has no effect
• My version of windows was a free upgrade program from Windows 7, would this be an issue?

Any help and ideas would be appreciated!

Many thanks,