Hello PAULGO,
Welcome to the HP Support Forums!
I understand you are looking to download and install the HP Officejet 6500a Plus onto your computer. It sounds to me that the web browser you are using is causing the download to time out, as a possible troubleshooting step try a different web browser.
I would like you to try installing this software for your printer: Download file
Let me know if this download allows you to install.
Thanks for posting,