Hello,
I understand you are looking for the Officejet 8600 software for Windows XP. I would like to help.
I am unsure of which model of the Officejet 8600 you have, therefore I am going to post some steps below for you to follow to help you find the driver and software you need.
- Find your printer, click on the link and select which OJ 8600 you have: Drivers & Software
- The next page will want you to select your operating system and click "next".
- Click Driver - Product Installation Software and Download.
From there, follow the on-screen instructions as it will automatically run and install the software and driver.
I hope this helps!
Take care:)