MacBook Pro 13 Mid 2010 Internet Recovery stuck
In the meantime problem is solved. I don't know what solved it. But I let it continue the 2nd time. After 30 min it ended up with an installation error, mentioning something about memory access problems. I restarted the whole thing again. Everything was the same, but this time it worked :). Now the next part, where it all started. Install Windows 7 on Boot Camp :).