I have been clicking the "I am a fan" option (from "Like what you see?" dropdown) on photographs of the pre-login-screen in Windows 10 (Windows Spotlight) for a few months now.
Is there a way to know which photos I have previously marked as "I am a fan"/"not a fan"?
These photos can be found in the hard drive by going to (Win+R):
This answer explains how to get the details of the photograph (through EXIF, XMP, etc.), thanks Moab for the URL.