Windows 10: Bought a Product Key but won't let me active. Says to check the code and try again

I bought a PC off my old friend about a year ago, three months ago "Activate Windows" watermark showed up in the bottom right corner of the screen and I finally came around some extra money to buy it.Bought it today and tried to activate but gives me error code 0xc004f050. Nothing I've looked up seems to work. If anyone can help me I would appreciate it a lot!Thank you:

:)

 

Windows 10 will not activate Error code 0x803F7001

thanks
I activated my Windows 10 from product key Windows 7

 

Windows 10 will not activate Error code 0x803F7001

Possibly there can be the problem with Microsoft activation Server, so your Windows 10 is not activated. In this scenario, you need to wait and verify if it is the issue from Microsoft’s side. But if you are getting error code 0x803f7001, you can also try these steps:

1. Open Settings app. Then go to Update and security > Activation screen > Change product.
2. Type your Windows edition product key and click Next.
3. You’ll get We couldn’t activate Windows error message.
4. Retry steps 1-3 then type your 25-characters unique product key.
5. Wait for the process to complete, Windows 10 is activated.

Hope something helps this problem

 

Windows 10 product keys and activation - and the KMS angle

My ASUS Laptop that I bought years ago has an embedded key for Windows 8 (Core). What I got on a clean install of Windows 10 was Windows 10 Home. It activated just fine and got a Digital License for Windows 10 Home. The sticker just Said Microsoft Windows 8, no product code was listed anywhere on the PC.