Fatal error occurred (4): null; WHAT IS THIS???

Question

Whenever I try to update Minecraft on my Windows 7 PC to 1.5.2, I get this:

Failed to lauch

Fatal error occurred (4): null

 

And whenever I select "Not Now", the screen freezes on "Done Loading". I've deleted my .minecraft file and redownloaded it many times, along with attempting to play it online, but nothing works. Any help would be greatly appreciated.

 

Answer 1

Happens to me it's a joke all the things people tell me to do i cant because the school network doesnt allow me too Mojang can go fix there game now!

Answer 2

It was a bug in the early release of 1.5.2 and is now fixed happy playing.