Do you mean the screen with the Cryptic symbol and the progess bar? It's just hanging and never taking you to character selection?
I'd do a search on these forums to see if anyone else is having the same issue, then I'd try the old stand-bys:
1. Cold restart the computer.
2. Do the full file check thing.
3. Update all drivers, etc.
All the above.
Log in, "screen with Cryptic symbol".
Between "areas", like leaving Sol and going to space.
After log, (character selection).
That's the worst actually. I sat here for 30 mins and finally closed the screen.
Have done a few cold shut downs. (And hard ones, from frustration!)
Haven't done a file check yet. I'll check that next.