As you point out, the info. from Canon is that they do not have available a driver for Windows 10.
Earlier this year I purchased a new desktop with Windows 10,
My Lexmark printer/scanner was recognized by Windows 10 . I can print, but not scan with it via the computer. I could not find an updated driver.
My Epson printer/scanner was recognized as well. I could print, but not scan. On the Epson web site I found the appropriate driver for Windows 10, and both print and scan work well.
This has nothing to do with Photoshop Elements. Suggest that you go to a reliable store, e.g. Best Buy, and check on the box of a replacement scanner as to the system requirements and compatibility with your operating system. Also chat with the sales person.
Before you do that, call Canon again and perhaps you will talk to another functionary who can identify a driver that will work.
Thanks for the input. As regards VueScan it works with my scanner but still does not offer the specific ability to scan slides. I have now found that the CanoScan software MP Navigator Ex 1.0 can be used to scan slides. The files can then be imported into Elements for further enhancement and archiving. I tried changing the scanner driver compatibility property suggested by Canon but this did not help and running the scanner from within Elements does not appear to be an option. John McWilliam