The iPhone is not designed to prevent the import of photos to Windows. However, as a Windows user, I can tell you that Windows 10 and their Photos app are designed to make it difficult. I've been using both for years, and I teach Windows at a community college. The removal of the standard import utility in Windows 7 when you upgrade to Windows 10 and their Photo app is what the problem is. Here is Apple's support document for importing photos, Transfer photos and videos from your iPhone, iPad, or iPod touch - Apple Support
Now this is Microsoft's support document for importing photos from the iPhone to Windows 10. https://support.microsoft.com/en-us/help/4027134/windows-10-import-photos-and-videos-from-phone-to-pc
I will tell you that one thing I have seen is that Windows 10 does not like a large number of photos and if you add in several videos, especially large ones, Windows seems to "get angry" and stop things. One thing I have found to make things easier for me is to first open Photos on the PC. Next, before connecting the lightning cable to the computer, connect it to the iPhone and unlock the screen. Make sure the screen remains unlocked and connect to the computer. Photos should recognize there is a USB device connected and it asks if you wish to import. Windows will attempt to detect the photos and then ask if you wish to continue. If you have not connected the two devices before, you will have to click on Trust on both devices. Good luck with that. I've actually purchased a MacBook Air to assist me in teaching Microsoft Office for Windows and Mac, and have started handling photos on my MacBook.