File won't delete

I’ve seen other postings on this topic, but none exactly like what I’m experiencing.
I’m cleaning out my sites and there is one file that I cannot delete for some reason. There were about 100 different other files in the same folder that deleted with no problem, but there is one single image that won’t delete. I get the “Error deleting file…No such file or directory.” Which is odd, because I can see it sitting there, and even call it up with a direct URL. I can’t rename it, nor move it, either.

How can I delete it?