You can download the official HP LaserJet Pro MFP M128fn driver directly from HP’s website by searching for your printer model on their support page and selecting your operating system to get the correct driver installer[1]. Alternatively, driver download sites like Driverscape also provide the latest PCLmS drivers for this printer for various Windows versions[2].
For scanning functionality, VueScan software supports the HP LaserJet M128fn on Windows, macOS, and Linux, and includes a reverse-engineered scanner driver if you have trouble with the official drivers[3].
Steps summarized from a tutorial video: search for “HP LaserJet Pro MFP M128fn driver” on Google, go to the official HP site, choose your OS, download the driver, then run the installer; after connecting the printer via USB or network and powering it on, the printer should be ready to use[1].
If you prefer direct links or further assistance, visiting the official HP support page would be the most reliable approach.