When I was using Windows 7 as soon as I pressed the scan button on the front of the machine a window opened on the monitor requesting whether I wanted to preview or scan. Now that I am using Windows 10 when I press the same button nothing happens.
You might be able to use the Windows Vista driver/or the Windows XP driver under compatibility mode. But it is not guaranteed to work. I would suggest either upgrading the scanner, or downgrading the Operating Operating System.
Be sure to download the zip file labeled as version 8.0.0.0 as the first one is a generic driver monitoring and upgrading application. (Not sure what it's doing) The one in the zip file should be extracted to a folder (I would recommend calling it by the name of the device, HP3500c or similar) then go to device manager by right clicking the Start button and selecting device manager. Look for your HP3500c in imaging devices. It should have a yield sign on it to indicate missing drivers. click update driver and select the location of the folder you made. It should install and work fine after that (in Windows 10).
I had the same problems when I upgraded to Windows 10. I tried downloading the file but when I went to install it, Windows 10 warned that one part of the file could be unsafe to install. Giving my problem some more thought I discovered a way to use my hpsanjet 3500c with Windows 10 without downloading any new driver, etc.
Click on Start, then Settings, Devices - scroll to the bottom of the page where you will see Related Settings with Devices & Printers and Device Manager underneath that. Click on Devices and Printers and the page will open to show all the devices on your computer. Right Click on your hpscanjet 3500c. A box will open with various options; at the top is Scan. Have something in your scanjet to scan whether a document or picture, etc. Click on scan and it will begin the scan. You can then import it to a folder by saving it with a name. Since I don't have a copier, I use this to scan a page for which I need a copy. I save and import it to the Pictures folder as a jpg file. This method also works for pictures that I want to scan to the computer. It will give the folder the current date and the name you chose so you can go to the folder and print whatever you scanned. The pictures can then put on a cd or dvd for transporting and making prints if you like.
Be sure to download the zip file labeled as version 8.0.0.0 as the first one is a generic driver monitoring and upgrading application. The zip file name I found the drivers in was: ef8565e9a42aac8cdf29cfdeefdec096.zip
I finally reached to Windows 10, and this post helped me find the suitable driver again. I am always sceptical about downloading suspicious stuff from the net since I do not use anti-virus programs, but I trusted this file since it has only zip-packed drivers and no hidden exe, bat or any other executable app. Anyhow, I unpacked this zip file, directed Windows where to look for the driver and it installed the device immediately. It worked like a charm.