Every time I join a server I can play the first time for a short period before it crashes. Then, when I go to hit a block it instantly crashes every time from there on.
http://pastebin.com/qCJ17vVm link a lot more details...
Game ended with bad state (exit code -805306369)
[01:34:05 INFO]: Deleting C:\Users\cy63rcr4ck3r\AppData\Roaming\.minecraft\versions\1.7.4\1.7.4-natives-8662600503347
[01:34:05 INFO]: Ignoring visibility rule and showing launcher due to a game crash
[01:34:05 WARN]: Couldn't delete C:\Users\cy63rcr4ck3r\AppData\Roaming\.minecraft\versions\1.7.4\1.7.4-natives-8662600503347 - scheduling for deletion upon exit