Recently I changed my computer and SC2 was running really well.
This morning we couldn't connect on Battle.net. Then after that a kinda update happened on SC2 beta. After that, when the game is ready to lunch, suddenly a black screen happen before the "SC2 Beta Loading" appears. I can't switch on Windows and stuff like that. I have to to reboot manually the computer. Then always the same thing... black screen...
If someone knows about this, it will be really kind to let know here.