Error: Could not find or load main class net.minecraft.client.main.Main
Java HotSpot(TM) Client VM warning: Using incremental CMS is deprecated and will likely be removed in a future release
My Minecraft Launcher is not working? - 1
email 23.12.2015
The first google result says you need to make sure that your Windows username doesn't contain special characters, like an exclamation mark.
Chris 23.12.2015