Minecraft is broken?

Whenever I open minecraft, everything is frozen after some time and I can't do anything anymore then the screen is black or white can someone help me?

Did you try reinstalling it?

Yes

If you press F3 in the game, top right: mem and maxmem. What are the values?

I do not usually get that far into the game

Oh. How much ram do you have and do you have mods, shaders etc?

Where is Ram? Mods shader no

Your memory in the computer? ^^

8 GB

Then try to assign Minecraft more ram

This is how?

Have done. The problem is still valid

Then I do not know how to continue