Minecraft Forums

I am having troubles launching minecraft. I have. Version 1.7.9 and launcher 1.4.4, and I am working with windows 7. I start the launch sequence and it sends me to the play offline screen, I click the play offline button and it shows the mojang logo then followed by a completely black screen, and shortly after it sends me to my desktop where I can't click on anything, I then start task manager and I switch to the minecraft task. That just sends me to a black screen. The weird thing is that if I'm connected to wifi the game will launch just fine.