You can try to delete Minecraft.exe, and re-download it from the website.
NOTCH
Minecraftnet is the only place where you can register the premium account that you need to play the full version of Minecraft.
Yes!
Because It has to many people on it
There is no other LEGAL place to buy Minecraft.
because you cant afford to play
hey guys why cant i get onto fronter when i type the correct username and password
If you own Minecraft on that account then YES!
you cant
you cant.
you cant :)