Guildwars Going all Cracked out on Me

This has never happened before in all my 3 years of playing only been happening as of like Last nightish.

Basicly when I play either in Full Screen or Windowed after maybe 20-30 mins the screen goes black for like a split second or freezes for a split second and all these little black or colored boxes fill my Screen and im Foreced to Restart the PC

Heres a Screenshot of it...

<a href="http://s532.photobucket.com/albums/ee329/Nightmare_pwner/?action=view&current=gw002.jpg" target="_blank"><img src="http://i532.photobucket.com/albums/ee329/Nightmare_pwner/gw002.jpg" border="0" alt="WTF is THIS"></a>

Anyone know what exactly is happening and what is cuasing it and how to fix it.

Thanks

It looks like your graphics card may be dying or overheating. Open the case and use compressed air to clean it out. You'll also want to update your drivers.

ahh ok thanks. I oftenly use air to clean out the entire machine but its been awhile since the last time i did it.

Ill try it again later tonight.

As for driver updates already have them.

If you're using and old ATi card, you may need to get Omega drivers.
Stuff like that was known to happen on ATi

Does this happen with any other graphics intensive programs?

GW is very touchy about an overhot GPU, so cleaning your case out extra well might solve it, if not start shopping for a new video card.....

Well you have Texmod on.... Texmod often dose weird things like that.