However, after forcing the Minecraft window to close, the launcher automatically opened, this was in the dev console:
Client> 2013-08-11 13:32:46 [SERVER] [INFO] Saving and pausing game...
Client> 2013-08-11 13:32:46 [SERVER] [INFO] Saving chunks for level 'Testing'/Overworld
Client> 2013-08-11 13:32:46 [SERVER] [INFO] Saving chunks for level 'Testing'/Nether
Client> 2013-08-11 13:32:46 [SERVER] [INFO] Saving chunks for level 'Testing'/The End
Client> 2013-08-11 13:33:42 [CLIENT] [WARNING] Memory connection overburdened; after processing 2500 packets, we still have 1332 to go!
Client> 2013-08-11 13:33:43 [SERVER] [INFO] Saving and pausing game...
Client> 2013-08-11 13:33:43 [SERVER] [INFO] Saving chunks for level 'Testing'/Overworld
Client> 2013-08-11 13:33:43 [SERVER] [INFO] Saving chunks for level 'Testing'/Nether
Client> 2013-08-11 13:33:43 [SERVER] [INFO] Saving chunks for level 'Testing'/The End
Client> 2013-08-11 13:34:55 [CLIENT] [WARNING] Memory connection overburdened; after processing 2500 packets, we still have 5256 to go!
Client> 2013-08-11 13:34:55 [SERVER] [INFO] Saving and pausing game...
Client> 2013-08-11 13:34:55 [SERVER] [INFO] Saving chunks for level 'Testing'/Overworld
Client> 2013-08-11 13:34:55 [SERVER] [INFO] Saving chunks for level 'Testing'/Nether
Client> 2013-08-11 13:34:55 [SERVER] [INFO] Saving chunks for level 'Testing'/The End
Client> 2013-08-11 13:37:03 [CLIENT] [WARNING] Memory connection overburdened; after processing 2500 packets, we still have 6855 to go!
Client> 2013-08-11 13:39:01 [CLIENT] [WARNING] Memory connection overburdened; after processing 2500 packets, we still have 7290 to go!
Client> 2013-08-11 13:39:01 [SERVER] [INFO] Saving and pausing game...
Client> 2013-08-11 13:39:01 [SERVER] [INFO] Saving chunks for level 'Testing'/Overworld
Client> 2013-08-11 13:39:01 [SERVER] [INFO] Saving chunks for level 'Testing'/Nether
Client> 2013-08-11 13:39:01 [SERVER] [INFO] Saving chunks for level 'Testing'/The End
Game ended with bad state (exit code -805306369)
Ignoring visibility rule and showing launcher due to a game crash
Deleting C:\Users\Tim\AppData\Roaming\.minecraft\versions\1.6.2\1.6.2-natives-178321465294595
Couldn't delete C:\Users\Tim\AppData\Roaming\.minecraft\versions\1.6.2\1.6.2-natives-178321465294595 - scheduling for deletion upon exitNo crash report was made, the game seems not to crash, it just stop's responding. When I look in task manager, It says that Java is not responding. The games fps still reads as 44 as I type this, but it is clearly 0. The game still seems to work however, as when I change programs it SOMETIMES opens the menu. I tried this on my laptop as well, once again a 64 bit windows 8, it also had the same problem.
Picture is of the launcher after force quitting MineCraft.