Guild Wars 2

I’ve had this a couple of times or 3 where GW2 seems to hang and then comes back to life seemingly ok. Except this time is persisted. I had just instanced on Dry Top and was attempting to turn the camera view when the screen went black. I was running full screen windowed, so pressed the windows key to access the desktop and found the windows Not responding dialog. Pulled this off :

Description:
A problem caused this program to stop interacting with Windows.

Problem signature:
Problem Event Name: AppHangB1
Application Name: Gw2.010
Application Version: 1.0.0.1
Application Timestamp: 55492238
Hang Signature: 9350
Hang Type: 0
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 2057
Additional Hang Signature 1: 935043cdf5b72f6bc91f3793c2763cf8
Additional Hang Signature 2: 457c
Additional Hang Signature 3: 457cb200db644433332211a6ae3d8042
Additional Hang Signature 4: 9350
Additional Hang Signature 5: 935043cdf5b72f6bc91f3793c2763cf8
Additional Hang Signature 6: 457c
Additional Hang Signature 7: 457cb200db644433332211a6ae3d8042

Closed GW2 so I could post this..
Hope it helps you out.
Server: Desolation