Minecraft ending with a "bad state"

When I launch Minecraft, it loads for a bit, then says
"Game ended with bad state (exit code -1073740777)
Deleting C:\Users\Owner\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-173507095836431
Couldn't delete C:\Users\Owner\AppData\Roaming\.minecraft\versions\1.6.1\1.6.1-natives-173507095836431 - scheduling for deletion upon exit"
I've tried re downloading it,but it still says the same thing.