@MojangSupport i bought minecraft yesterday on my laptop and had no problem launching the game or signing in, but on my main computer where i usually play i cant sign in into http://minecraft.net or even the MC launcher but i can sign in perfectly into mojang can you help me?
The use of a third-party launcher in the past could have caused your device to no longer prioritize Mojang's servers when logging in, resulting in this kind of issue going forward. I hope this helps! ^SA