Hello,
Upgrade to Windows 11 from Windows 10 is free.
However, it is important to make sure your computer is meeting the hardware requirements for the upgrade first. To do so, run the PC Health Check app according to this instruction here: https://support.microsoft.com/en-us/windows/how... See if your computer supports Windows 11.
If so, you can go to the following link, download and run the Installation Assistant Tool to upgrade to Win11.