Modern Windows often rejects old drivers. Here is the correct method to force-install version 8.10.
Right-click hp designjet 500 pcl driver -v8.10-.zip → Extract All → to a folder like C:\DJ500_Driver . hp designjet 500 pcl driver -v8.10-.zip
Modern operating systems try to install drivers automatically via Windows Update. However, for a printer as old as the DesignJet 500, Windows often fails to find the correct driver, or it installs a generic "HP DesignJet 500PS" driver (PostScript) by mistake. Modern Windows often rejects old drivers