I tried to launch Minecraft and console gave me this error: a wifi flow named com.mojang.intdev.minecraftlauncherupdater with 933817229841.981567 download rate, epoch's top is 933817229841.981567. Seeing it was something to do with WiFi i turned it off and Minecraft launched but it did not let me start any snapshots. Attached is a log file containing the errors from console. The one I put above isn't there because symptomd made it.