Is there a free emulator that still supports Windows 7?

❌ NO. Genymotion Desktop free edition no longer targets Windows 7, and the current desktop releases are the supported option for Windows 10+ only. Genymotion Desktop downloads are available from the official download page, and older Desktop 2.x versions are obsolete and no longer available nor supported: Genymotion Desktop 2.X Releases.

If you need a Windows 7-compatible emulator for a specific Android version, what version are you trying to run?