Hi I'm not very good with computers I only play occasionally. So my game keeps crashing after the unreal logo come up when the game is starting up.

My brother and I searched ways to fix game not lunching, I have uninstalled it and reinstalled the game, cleared the cache, made myself admin, uninstalled and reinstalled steam even also verified files and it says that the files are fine.
I check to see if my virus scanner was the problem but it can't find the game like it dose my other games.

My game was work a couple of weeks ago so I don't know what has happened also my virus scanner wont find the game like it dose my other games.
So any advice as to how to fix my game please would be much appreciated.