All my iPad photos won't show in my PC

Since the last software update, when I plug in the usb cable from my iPad to my PC, only a few photos show on the folder of the PC. Up until some time ago all the photos were visible and I could even move them from iPad to PC. Then I could only copy them (so I had to delete them one by one with the iPad), now I can only see some of them. At the moment my "all photo" folder shows 210 images, but on the PC I only have 79.

Has anybody experienced this? I tried downloading iTunes, but it only shows the music I have on the iPad.

Thank you.