Protools 11 boots, but hangs on opening a session.

[Hugo.K]

Protools 11 was working fine, but suddenly I can not open any session without crashing immediately, occasionally it opens a session, but than it is sluggish and not reacting to any input. Off course reinstalling, even went back to an image without protools 11 from a month ago and reinstalled Protools 11, didn't work. But hear this: after booting from an external drive and than reboot from my internal HD solved the problem. Protools works fine again. It happened to me twice now, of course the second time I immediately booted from external and indeed after that Protools was fine again. I don't think it's my computer, because nothing else than P11 has it. P10 was functioning normal all the time.

Does anybody recognize this?
If not than maybe this thread saves someone from reinstall his complete setup, simply boot first from another drive.

cheers
Hugo.K