To know what version of Windows you have on your computer, you can follow these simple steps:

1. Click the Start button or the Windows search bar at the bottom left of your screen.
2. Type "winver" and press Enter. This will open a window showing your Windows version and build number.
3. Alternatively, you can go to Start > Settings > System > About. Here, you will see detailed information about your Windows edition (e.g., Windows 10 Home, Windows 11 Pro), version, and build number.
4. You can also open Command Prompt or PowerShell and type "systeminfo" to see detailed OS information.

These methods work for both Windows 10 and Windows 11, and provide you with all the essential details about your Windows operating system.