i need a product key for windows purchase in 2021

Question

i need a product key for windows purchase in 2021

Peter Tran 0

I bought windows in 2021, i can see it in my purchase history. I was never given a product key. I swapped mobos and cant reactivate my windows. I need the product key.

John Jefferson Doyon 87,730 Reputation points Independent Advisor

2026-09-15T16:59:14.1833333+00:00
Hi, @Peter Tran

To help narrow this down:

What is the exact name of the Windows license or product shown in your 2021 purchase history?

Where did you originally buy Windows: directly from the Microsoft Store, from another retailer, or did it come with the PC?

Any additional info about the issue you can provide will be helpful in diagnosing and resolving the issue.

Thanks!
Neil D 34,305 Reputation points Volunteer Moderator

2026-09-15T18:26:58.9266667+00:00

If it was from the windows Store you bought a digital licence, no product key. You account is the key.

Use the Activation Troubleshooter and select the option I changed hardware it should show the previous device in your account. You can select that to transfer the licence.

Your answer

John Jefferson Doyon 87,730 Reputation points Independent Advisor

2026-09-15T16:59:14.1833333+00:00

Hi, @Peter Tran

To help narrow this down:

What is the exact name of the Windows license or product shown in your 2021 purchase history?

Where did you originally buy Windows: directly from the Microsoft Store, from another retailer, or did it come with the PC?

Any additional info about the issue you can provide will be helpful in diagnosing and resolving the issue.

Thanks!
Neil D 34,305 Reputation points Volunteer Moderator

2026-09-15T18:26:58.9266667+00:00

If it was from the windows Store you bought a digital licence, no product key. You account is the key.

Use the Activation Troubleshooter and select the option I changed hardware it should show the previous device in your account. You can select that to transfer the licence.