Lauching Game Failed

43:57.791
Preparing to launch minecraft client for 1.8.8
21:43:57.870
Checking installations.
21:43:57.870
Minecraft client 1.8.8 requires 136553030 bytes to download.
21:43:57.870
Starting!
21:43:58.855
Unable to download https://libraries.minecraft.net/com/mojang/netty/1.6/netty-1.6.jar to D:\anels85\AppData\Roaming\.minecraft\libraries\com\mojang\netty\1.6\netty-1.6.jar
21:43:59.109
TIMER: Downloads took 1 seconds.