Latest update causing problems

I'm using a PC - 16GbRAM, NVidia G-Force 750M graphics card, Windows 10

Since the last update of Photoshop, each time I do anything to an image, it distorts and shrinks. 

I open this

If I apply ANY adjustment - filter, crop, size-change ... anything, it does this:

If I apply anything again, it does this:

Until it disappears entirely.

What is going on and how can I stop it?

Thanks,

Johnny