Okay, I'm back.
Yes I've tried lowering my settings, it made no difference.
I have also discovered this is not the problem everybody else is having, it seems that it isn't a framerate or lag problem, but a problem with something on my computer, the exact same thing happens with another mmorpg called Rappelz, another called Space Cowboy, and occasionally but nowhere near as bad (I don't even know if it has this problem), is Dungeon Runners.
Another thing I forgot to mention is sometimes the graphics seem distorted too, on Guild Wars, aswell as the contant freezing, certain groups of colours go strange, like sometimes the notices part of the login screen, or parts of the login screen background. On Space Cowboy some menus go strange, on Rappelz the whole screen seems to implode, meaning most colours go strange, fragments of the screen change colour to blueish or black, sometimes grey, bits of the screen are cut up and moved around instead of the loading screen, kind of like a collage
And on dungeon runners it just freezes, but hardly ever.
Also, by strange in colours I mean kinda pixelated and grainy.
And another thing, when the game freezes, on Rappelz, Space Cowboy, and Guild wars, about halfway through the freezing period the music loops, and on Dungeon Runners it stops until the freezing stops. Please help me, I can only play dungeon runners right now!