Hi BansiPatel,
I also had a similar issue, with the same laptop.
After trying all the methods mentioned in online forums and support docs, nothing happened.
Finally, I got my problem resolved by contacting the Microsoft support team via the "Get Help" app that comes with windows.
This was the solution:
- The support team member asked me to log out from the office (by logging out from word).
- Then close the Word app.
- Again login into Word app with your Microsoft account, this will you give a prompt to activate the office.
- Click "Activate" and done!!!!.
This was a quite simple solution, but I am not sure if that support team member team did something at her end. But Definitely, you can try logging out and then log in again to the office.