Trying to download photos from iPhone 5s to Windows 10
You should download "OneDrive" on your iPhone. Then on your OneDrive account you set your iPhone to upload all pictures on Photos. All your pictures will be uploaded. Then you open https://onedrive.live.com by your Windows 10. It can work with iCloud as well, but I like OneDrive more. That's how I duplicate my pictures on iPhone to Windows 10. Good luck!