Although a bit expensive I have a Canonscan 8800f that can act as a flatbed, slide, or film scanner. Not very quick but good quality - some of the cheap slide scannere do not do a very good job. Some people here have used a camera to take pictures of projected slides. I think there is a newer Canonscan.
How to get Windows 10 now: how to download and install Windows 10 even if GWX.exe is missing