Seems like a stability problem, no problem if I connect myself directly to an outside server.
2 Errors:
failed to generate session key for dynamic DNS: permission denied
could not create C:\Program Files\ISC BIND 9\etc\session.key
As long as your network is healthy, there should be no randomness..
Find the Windows Event Viewer, and look in the Application Event log... Any errors in there pertaining to named?
2 Errors:
failed to generate session key for dynamic DNS: permission denied
could not create C:\Program Files\ISC BIND 9\etc\session.key