The HP LJ M225/M226 Scan Driver is a software driver required for scanning functionality on the HP LaserJet Pro MFP M225 and M226 series multifunction printers. These printers are capable of printing, copying, scanning, and faxing, and the scan driver allows your computer to communicate with the printer's scanner hardware to enable scanning operations. Without the appropriate scan driver, your computer won't be able to use the scanner feature of the device.