I had several cards which I couldn't open in Windows 10 due to the age of product.

I asked hither and thither and one suggested to go to an outlet that had a Kodak machine.

We travelled to an independent camera store today who we have been aware of for many years. It seems the old ones know best.
We left 11 cards with them and half an hour later returned to find the images transferred to a memory stick.

I mention this as it seems other folk also had a similar problem.

My thanks to Chesham Cameras (UK).