The game client encountered an unexpected error and had to close.

[Khalus]

Hi guys,

Totally weird, it could be 1 of 2 things, your drivers for your graphics card (are they up to date?)
Or it could be your install.

What I want you to do is uninstall ARR and reinstall it.

Drivers are up to date always but reinstalled them anyroad, reinstalled the game too and its actually crashing more now...doh!