Minecraft Forums

So I accidentaly opened feed the beast while minecraft was still open and then I closed minecraft and it said not responding and than closed. Now I can't play vanilla minecraft. If I load a world in 1.7.5 or lower it brings me back to the launcher when I load up a world. If I load up mc in a snap shot I don't even make it to the title screen it just crashes. I've tried every thing. When I install minecraft It doesn't give me a jar file for it either so my cousin sent me his jar file and everything from his minecraft and it still won't work. It's as if its the computer. I tried to delete my entire .minecraft file I deleted the .exe but nothing works. I need help on this problem, major help on this problem!