User blog comment:G-man./I am back/@comment-3242795-20120424102623

I know how to fix the "Minecraft FAIL" on Windows.... go to

C:\Users\(Your Username on your comp)\AppData\Roaming\.minecraft

and delete the "bin" folder. Then, go to the launcher, and login/play like you would any other day. It will reinstall the bin folder. Oh, and clean out your "mods" folder as well. Yes, you'll have to reinstall all mods, but it fixes the game.