Accidently deleted some system photos

Hello, so I downloaded a duplicate photo delete program and I didn't realize it had some system photos to delete as well.

Well it's been a while since I ran it (over a month ago) and well now in some spots of Windows 8.1, there are just rectangle boxes instead of the actual photo that should be there.

I'll attach some pictures showing what I mean.


Now is there any way to get them back without formatting or resetting and losing all my programs?

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