Windows 10: Windows 11 Error Code: 0xcfffffff

How to solve the Windows 11 Windows Update Error code 0xcfffffff?

:)

 

Windows 7 to Windows 10 - error 0xCFFFFFFF 0x40019


Trying to update my Desktop PC from Windows 7 to 10. I have already had a fault free upgrade of my laptop, but my desktop fails.

Initial Installation seems to go fine, until I am asked to re-login. When I enter my password to login to the PC for the first time with Windows 10, the screen freezes. If I try to do anything, I get a reboot - and the problem repeats.

Eventually, I rolled-back (successfully) to Windows 7 and received the above error.

Google has been of little help, and neither has the Microsoft help (although they suggest the error 0xCFFFFFFF is an app-hang). I don't even know where to start looking!! Any ideas???????

 

BIOS error codes

So I have motherboard with installed small LED screen, which presents BIOS error codes.

Where can I find a list of those errors. And I don't mean beep codes, but the "number" codes.

Ex after installing sound card, the motherboard startup fails with the code 15.

Example picture of code is here.

 

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