You can easily download your iCloud photos onto your PC through your web browser. Make sure you have "iCloud Photos" turned on in your Apple settings.
You can upload photos to iCloud from your iPhone, iPad, PC, or Mac computer and easily sync photos across all of your devices ...
iCloud Photos generally works to sync images and videos across your hardware linked with the same Apple ID and for which you have Photos syncing enabled. When it doesn’t, don’t expect much feedback ...