When I play Minecraft the screen turns black and I don't know why?

So about 3-4 weeks ago my Minecraft started to crash, for no reason. I would be playing Factions or Minigames then boom a black screen. I didn't download any Mods or texture packs.
And I tried looking for answers from other people, but they all said delete the bin file cause the Meta-inf is the source of the crashing, but the thing is I don't have a bin file and I also don't have the Meta-inf
So can someone help me please, I know someone out there had the same problem as me one time so please if that's you, can you please tell me how to fix the problem.

Added (1). I can get on the home screen and in a world or server its just after 2-4 min it crashes

Katherine

Does it crash immediately after launching? Do you ever see the home screen? Do you get into world/server?

Re-downloading minecraft might solve it.
Or you could make a new profile (not buy the game again, but re-download minecraft)
Open Minecraft launcher > New Profile (bottom right) > Give it a name, an un-used game directory, use version: "use latest verion" or 1.7.4 or something like that> save profile > launch as this profile.

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