Minecraft crashes with error 34749

I've looked this up and people have suggested its with antivirus... I've unistalled all my antivirus. Allowed java and minecraft through the firewalls, and even ran as administrator. The weird thing is, I went to change the game version to 1.6.4 and I was able to create and play freely on single player. But when I go back and change the version to 1.7.2, I get the error again. Doesn't make any sense. Which means it can't be a security issue. Anyone? PLEASE!