The progress bar moves an inch or so, then the screen goes to black, and nothing moves again. I have to force quit Wow, then it restarts just fine.
Windows Application Log has this:
The program WoW.exe version 184.108.40.20605 stopped interacting with Windows and was closed. To see if more information about the problem is available, check the problem history in the Problem Reports and Solutions control panel. Process ID: 1fe0 Start Time: 01ccaecb0f4165c0 Termination Time: 13
No other errors appear.