@Hipposgrumm it's not invalid if the mod isn't attached to the game, I said I downloaded it to my pc, not that I had attached it to Minecraft.
@violine1101 this tells me nothing. Obviously it's an issue if other's are having the same problem, then it's a problem Mojang needs to fix.
@violine1101 This also doesn't say anything about why I can't login onto the Minecraft.net website to redownload the game. This is where I was sent too when I went to support on that website.