Windows 10: My laptop suddenly shows to activate the windows

I'm currently using "Windows 10 Home" and I have used my laptop since 2017. There's no such kind of license problem before. But, last 2 days ago, I got this error and my laptop is constantly showing the notification to activate the windows. As a consequence, I can't use Microsoft Office now.

Can i know how to fix it?

Is there any kind of expiry date in "windows 10 license", that makes us to reactivate the windows with the new product license key?

:)

 

Insider laptop suddenly not activated

hello all,
today I suddenly noticed that my laptop is no longer activated... don't know what happened.
I found out that was using local account, but then I immediately switched back to microsoft account and still can not activate windows because I do not have valid digital license or valid product key.
If I click on solving problems then it is saying that product key can not be used with this version of Windows since they found Windows 10 Home digital license for this device.
Checking https://account.microsoft.com and my laptop is there listed with Windows 10 Professional OS as it always was.
Why and what happened and how to solve it ?
I do not have product key. The key is generic ending with 3V66T.

 

Insider laptop suddenly not activated

Also slmgr /ato in an admin PS or command prompt window does the trick, too.



--Ed--

 

My Activated and Genuine Windows 10 Suddenly Showing Not Activated

My Activated and Genuine Windows 10 Suddenly Showing Not Activated,showing the error code 0x80004005