You can check for updates on Windows 10 by going to your "Update & Security" menu. If an update is available, it'll begin ...
You can choose to upgrade to Windows 11 for free if your computer is compatible. You can buy a new PC that already has Windows 11 pre-installed (or opt for an alternative, like a Mac or a Chromebook).
If you still use Windows 10, you need to take action to ensure your PC still receives critical security updates.