What I expected to happen was for the game to run like normally.

*What actually happened was that I couldn't connect to Minecraft.net, at first. Error 500 was the issue apparently. I redownloaded the launcher, as well as uninstalled/reinstalled the latest version of java. I retried to play, but still, the only option is to play on offline mode, and even then, I try single player, and it can't download the terrain before crashing completely. The launcher log mentioned error 10106? Now just this appears when I try to play (attatched).