Re: Win10 fixed this for me
MP600. I fudged it (for printing, at least) with some effort, but not before being browbeaten by a certain domestic user for having "chosen" to accept the unwanted OS "upgrade", when she then couldn't print or scan anything. Interestingly, I see the MP600 support page on Canon's uk website now seems to offer win10 32- & 64-bit drivers.
Maybe I should check again and see whether the stupid machine now recognizes my Galaxy S5 too? Maybe too much to ask.