The Internet Keyboard (WinNT40) Windows driver is typically associated with a keyboard that has additional Internet or multimedia keys, such as buttons for web browsing, email, volume control, or other functions related to online activity. These additional keys require a special driver to be fully functional on a Windows operating system, and this driver is likely designed to support the keyboard in Windows NT 4.0 or higher versions of Windows (e.g., Windows 7, 8, 10, etc.).
This type of driver would enable features beyond basic keypress functionality, specifically making the specialized keys (such as web, email, and media buttons) operational.
The WinNT40 designation suggests the driver was originally made for Windows NT 4.0, but it is often compatible with later versions of Windows as well. It is not uncommon for older keyboards to use generic drivers that work across multiple Windows versions.