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!
Create a new folder on the hard drive: c:\dj640 before downloading the printer driver.
Download the driver to the newly created c:\dj640 folder.
Open the c:\dj640 folder and double-click on the dow