Windows 10: Windows can't find my activation code when i downgraded from Windows 11 to 10.

Basically, i didn't make this PC, it was a pre-build and the operating system was already in it Windows 11 and wasn't logged in as a Microsoft account but rather as a local account. I later on just signed up on Microsoft. Recently, i downgraded Windows 11 to 10, and i saw that it couldn't activate the product key that was on the Windows 11. Since I've already done that before with a laptop, i tough it was gonna save it. Every options, or buttons i tried to fix this issue in the activation section doesn't show anything or couldn't help, so i again, upgraded to Windows 11 to see if the issue w

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Windows 10 will not activate Error code 0x803F7001

thanks
I activated my Windows 10 from product key Windows 7

 

Windows 10 Tweaks

Pressing “Windows+Pause Break” (it’s up there next to scroll lock) opens the “System” Window.

Windows 10: In the new version of Windows, Explorer has a section called Quick Access. This includes your frequent folders and recent files. Explorer defaults to opening this page when you open a new window. If you’d rather open the usual This PC, with links to your drives and library folders, follow these steps:

• Open a new Explorer window.
• Click View in the ribbon.
• Click Options.
• Under General, next to “Open File Explorer to:” choose “This PC.”
• Click OK

credit to Lifehacker.

 

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