The computer and Windows 7 OEM were bought in different places, the motherboard was replaced on the computer, how to restore Windows activation?

Question

Computers

I bought a computer for my parents in one store according to my assembly, but at that time they didn’t have the version of Windows I needed, I had to buy it in another store (I know that you can’t do this, but still ...)
The computer broke down, they fixed it under warranty with replacing the motherboard, now Windows naturally says that it has changed hardware and needs re-activation, but the code from the sticker does not work, what should I do?
Is it possible to solve the problem through Microsoft support?
Or is it possible to influence the seller of the computer with the requirement to replace the installed Windows, because the damage was caused due to the breakdown of the sold goods?

Answer 1

Was in a similar situation. Activate by phone, the robot answers there, asks you to enter the numbers that the axis issued, in response it gives its numbers. Enter and everything starts working.

Answer 2

As far as I understand the intricacies of licensing, this is a problem of the service that repaired your computer.
In general, I would advise you to call or write to Microsoft and describe the situation to them.