To tell which Windows version you have, you can use one of the following simple methods:

1. Press the Windows key + Pause key simultaneously. A system information window will appear showing your Windows edition and some system details.
2. Press Windows key + R to open the Run dialog, type "winver" and hit Enter. This opens a window showing your Windows version, edition, and build number.
3. Open Settings by pressing Windows key + I, then go to System > About. Under Windows specifications, you will see your Windows edition, version, and OS build number.
4. Alternatively, you can open Command Prompt (Windows key + R, type "cmd", press Enter), then type "systeminfo" and press Enter. This command provides detailed information about your Windows version and system.

These methods work across multiple versions of Windows including Windows 10 and Windows 11.