The HP Printer (BIDI) Windows driver refers to a driver that enables communication between your HP printer and your Windows computer using the Bidirectional Communication (BIDI) protocol. This protocol allows the printer and the computer to send information back and forth, such as status updates, ink/toner levels, paper jam alerts, and more. It's essential for ensuring that your printer works correctly with your system and can send and receive status messages.

The BIDI driver is often bundled as part of the general HP printer driver package, and it’s necessary for certain features of the printer to work, such as two-way communication, status monitoring, and alerts. Without it, your printer might only be able to print but could lack the advanced features such as status feedback or remote management.