Hi Carolyn. I'm Greg, an installation specialist and 9 year Windows MVP here to help you.
See here for problems importing pictures to PC from iPhone:
https://appletoolbox.com/2018/06/what-to-do-if-...
https://www.thewindowsclub.com/cant-import-phot...
What also works is to install iCloud so that the pictures are transferred seamlessly in the background from Phone to PC:
https://support.apple.com/en-us/HT201391
https://support.apple.com/en-us/HT205323
I hope this helps. Feel free to ask back any questions and keep me posted. If you'll wait to rate whether my post helped you, I will keep working with you until it's resolved.
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