Guild Wars 2

I can play the game just fine, do world boss with 100+ ppl, even tequatl without a crash, but every time i try to go to heart of the mist for some spvp i crash in under 5 mins usually. It happens randomly, sometimes it gives me time to start a game, other times it crash just after the loading screen. It’s been some weeks, i’ve tried searching around, sending crash reports(when i get one..other times it just crash) updated my gpu drivers etc but nothing seems to work.

i am seeking help since spvp is one of my favorite mode and i just can’t play it this way.
i updated a crash report(hope it’s the right one, in case tell me how to find the right one) of one of the crash that happened during the past weeks

pls help :C

system information:
windows 7 ultimate 64bit SP1
intel core i5 CPU M 430 @ 2.27GHz
NVIDIA geforce 310M
4GB ram

As the title says, i am encountering a lot of random client crashes after the last patch, before this i never had a crash so this i bugging me quite a lot, it happens randomly and most of the time while i am in a city. any idea?