The M-Audio Keystation 49e is a USB MIDI keyboard controller designed for use with music production software on both Windows and macOS. The Windows driver for the Keystation 49e ensures that your computer can properly recognize the keyboard and allows communication between the device and your music production software. MIDI (Musical Instrument Digital Interface) drivers enable the keyboard to send note, control, and other musical data to your computer.

The Keystation 49e is typically a "plug-and-play" device, meaning it should work automatically with most systems running recent versions of Windows, but installing the specific driver may be necessary for full functionality, especially if you're using music production software or DAWs (Digital Audio Workstations) that require a specific driver for lower latency, better compatibility, or access to advanced features.