The windows 11 update pop up

Hi Gaopen​ 

This pop-up is a notification for upgrading your Windows to version 11. It usually appears when your device meets the upgrade requirements. If you wish to proceed, you can click on ‘Schedule it’ to begin the upgrade, or you can click on 'Got it' if you want to continue with your current version for now.

However, it is always recommended to upgrade to latest version, to benefit from improved security, performance, and new features.