file type in windows labeled as "file" (previously wasn't)

i had a graphic file, it might have been a jpeg, and now it just shows up as "file" in windows and i cannot open it. what could have happened?

Did you go through the whole right-click > Open with > your default/usual image software? My default settings constantly get thrown off and I've had similar problems, I usually try to redefine the default settings for the type of extension AGAIN and it helps most of the time.

After a second look, it looks like the file extensions got lost somehow. I just re-added them.