Can not download pictures from Iphone to PC

Hello,

me and my family can not download the pictures from Iphones to PC, but some time ago it was possible. For me it’s possible to download pictures very selective, for my husband downloading happens for 20-30sec, for my husbands mom it’s the same. My modele is 6s my husbands 8+, husbands mom 7. Each of us are using different PC.

thanks,

Krista