Minecraft will not launch even after computer restarting and game reinstalling. Fatal Error of missing files keeps occurring in the activity log.

What I expected to happen was...:
Launch normally?

What actually happened was...:
That it did not?

Steps to Reproduce:
Like I said, I tried to refresh my own computer and Minecraft, but I don't know if it can be reproduced. I think the chances are it can be, because this computer just got a repairing, with a fresh start.