The iLok Windows driver refers to the software required to use an iLok USB dongle on a Windows-based computer. The iLok is a hardware-based copy protection system developed by Pace Anti-Piracy and is commonly used by software developers to prevent piracy by requiring users to physically connect an iLok USB device to their computer in order to use certain software programs.

The iLok is used by many professional audio, music production, and creative software tools (like Pro Tools, Ableton Live, etc.) to manage licenses and protect intellectual property. If you are trying to use software that requires an iLok, you'll need to install the iLok driver to ensure your computer can detect and interact with the device.