What is the best way to tell the which Windows edition is installed in your computer?

To tell what version of Windows your computer is running, click on the Start Menu (the icon in your taskbar which has the Windows symbol, the four colored squares).

When the Start Menu drops down, click on My Computer, usually in the grey part on the right (it has an icon with a blue-screened monitor).

The My Computer window will open. Now click on Help, then on About Windows.

A small panel will open giving the version of Windows your PC is using.