When I press "play" and it starts to launch the game the following message is written.

[19:25:38 FATAL]: Fatal error launching game. Report this to http://bugs.mojang.com please!

and

[19:25:39 ERROR]: Game ended with bad state (exit code 1)
[19:25:39 INFO]: Ignoring visibility rule and showing launcher due to a game crash
[19:25:39 INFO]: Deleting C:\Users*****\AppData\Roaming\.minecraft\versions\1.8\1.8-natives-481441026298
[19:25:39 WARN]: Couldn't delete C:\Users*****\AppData\Roaming\.minecraft\versions\1.8\1.8-natives-481441026298 - scheduling for deletion upon exit

And i can't understand why.

Sorry if my english is not comletely correct