Man, I tried for many days since I’ve bought GW2 to fix this low fps issue.
Today, after many tries and putting every config on my lap top on low settings I found someone who resolved my problem with a simple solution.
I don’t know why but I did this:
Open anything that runs with flash, for example “Youtube videos”.
Then right-click on it and select Configuration.
Disable Hardware Acceleration.
That’s all!
It fixed my problem! =D