DMG

I am a basic user with minimal PC knowledge. No geek in my name. Using windows 10, and eset smart security. scan is successful but there are hundreds of files that show "unable to open. Many files have cryto, panther, machine keys, names in their title and it makes me nervous I may have a bug that copies key strokes or some threat along that line. Can anyone shed light on this for this PC dummy? Thanks!