Hey pawlie,
We currently do not have any known issue (or known bug) causing the game to crash. Game crashes will happen in any game, and usually happen because of outdated drivers, or compatibility issues with other softwares.
If the game keeps crashing for you, please do follow the steps in this article, this should help quite a bit. 
If the issue persists after that, please post a MSinfo in your response, using the Performated Text option.
Alternatively, if the crashes happen on a specific class, or while using specific spells, or when killing a particular mob, and if you can reproduce the issue consistantly, it may indicate that there is a bug with the game, which can be reported to our developers.