Guild Wars 2

Hi I been playing GW2 for about 2 weeks now and its been working fine, up til about 5 days ago. Everytime I get on it now after about 10-15 mins into playing. The game freezes up nothing works I have to shut off power to my Comp and do a hard reboot,then its fine for rest of the day. I play other games WoW,Rift,a few free to play games and this never happens on them. Just on GW2. any I checked my drivers all up to date. I play on Wins 7 64 bit. Thank you for any help I can get.

just as i finished my storyline and was about to go meet queen poof, lol it happened to me too