Game Crashes

This happened after not playing Minecraft for a long time. I reinstalled Feed the Beast, tried to play it, and realised I couldn't play multiplayer as the servers were always pinging. Then I went onto singleplayer, tried to run it, and it crashed. I decided to try vanilla minecraft, only to get the same results. Could not connect to anything multiplayer, and singleplayer crashed the game

Steps to Reproduce:
1. Launch game
2. Go onto singleplayer
3. Create new world
4. Game crashes