It comes from university so it's not likely to be a virus. Just this one time our lecture sent us his slideshow on one of the topics, in his email there were three attachments, out of which only one was the real slideshow but I mistakenly downloaded a fake/empty one that shares the same file name.
I scanned it with updated AV and Ad-ware it appears to be non-malicious. I tried rebooting the computer but right after I hit "delete" an error window popping up (as attached). I also attached the file's property.
Could someone plz help, I know it doesn't take any disk space but it's just annoying to see it there without a purpose...