Tried to download one for previous windows version with no luck. Have tried selecting other printer drivers from HP. Windows 10 Printer Driver for HP Laserjet. View and Download HP 4000 Series, 4050 Series service manual online.
Hewlett- Packard Printers Service Manual. I have 2 laserjet 4000TN running with Windows 10 x64 and Windows 10 x86 PCs. Driver that works for Windows 10 x64 is the Windows 7x64 driver for Laserjet 4050 PCL6. Driver Name is HP Laserjet 4050 PCL6 version 6.