In Windows 10, noticed that there are duplicate “iCloud Photos” icons pointing to the same folder. Did a uninstall/reinstall of iCloud for Windows and 2 more appeared! Both Windows and iCloud using latest versions.
Under right click for the folder(s), there is NO Delete option, no effect if I delete it with Del key either. The Security tab under Properties for the folders shows Full Access. They are marked as “System Folder” rather than just Folder.
First I did a Regedit search for “iCloud Photos” and noticed where there were 15 of them (in my case) in the same area. Look at HKEY_CURRENT_USER\Software\Classes\CLSID and HKEY_CURRENT_USER\Software\Classes\Wow6432Node\CLSID, that is where my duplicates were.
Below is a sample to remove just 1 occurrence of the 15, you have to change the key (226e.. etc in my case) and run it for each of your keys of course.
Good luck, no guarantees, use at your own risk, and backup first!
Windows Registry Editor Version 5.00