This is the most reliable way to find a compatible driver if an official one is missing . Open the and click on Devices and Printers .
: A third-party application that supports many legacy scanners, including the HP ScanJet 3500c , even when official drivers are missing .
Download the driver from the HP Support site if available . Right-click the downloaded .exe file and select Properties . Go to the Compatibility tab.
Ensure your scanner is plugged into a power outlet and connected to your computer via a .
Click or Add a device at the top of the window . Select The printer/device that I want isn't listed .
To install the on Windows 7 , you must primarily rely on manual installation methods or third-party drivers, as HP does not offer official software for this model on Windows 7 .