A parallel cable on Windows 95/98/ME.
A USB or parallel cable on Windows 98/ME.
Note: The DeskJet 640u is USB only.
Uninstall the current printer driver before installing this new version of the printer driver. To remove the printer driver, click "Start", "Programs", "hp deskjet 640c series", "hp deskjet 640c series Uninstall" and then follow the on-screen prompts.
Caution: The printer's cable (USB or Parallel) must be unplugged before proceeding!
Automatic Installation Instructions:
Automatic Features (available only for Internet Explorer and selected languages)