My whole system is "lagging"

Well I know it's not technically "lag" but it seems that whenever I do something, most notably on Guild Wars, my display is not rendering it as a video, more like a bunch of still images, patched together. After about 5 seconds, my display will have rendered about 3 images, but it will render it seemingly from the top of the screen down, resulting in a very slow everything.

I'll post a video to make it more clear...

Edit: okay no video then, apparently it's not recording it any differently then "normal", but basically what's happening is it's visibly loading images, starting from the top, working it's way down to the bottom of my display, then starts loading an image from the top again. It all happened when I was browsing in Cooliris (firefox addon) and my computer overheated (-.-") and shut down. I turned it back on and ever since then, it's been acting up; any advice? :S

P.s. Yes, I have restarted, and it hasn't fixed the problem

If your MoBo has integrated graphics, make sure its using your graphics card not the integrated mobo one. Maybe the vid card fried and switched to the integrated....

So this is happening no matter what you do now? Not just while playing games? If it's GW only it may be a corrupted .dat file - if it's everything then it's likely a dead/dying video card.

Can you post your system specs Please?

Yeah, it's happening on a less-intense scale when doing anything else, but is very noticeable when I play Guild Wars; I will try re-installing my .dat file, and we'll see what happens.

Not sure what exact system specs you want, but:

Intel Core Duo CPU
T2350 @ 1.86GHz
1.86GHz, 1.00 GB of RAM(DDR2)
nVidia GeForce Go-7600

MoBo = Motherboard if I'm assuming correctly; how would I check if it's using the integrated graphics card rather then my nVidia one? Would it just be in the Device Manager? If it is, then I'm pretty sure it's not using the integrated graphics.

start -> run -> type "dxdiag" (no quotes)
Couple tabs to the right, look at "display" see what it sees your display as.
If it isnt your gforce, then bad things.
But I dont know how laptop motherboards / chipsets are set up. You may not have a secondary display.
(is it a laptop? i saw the geforce-go so assume so)

also...if it is a laptop:
Click on your power icon in the system tray, and go to power properties. Make sure it isnt on powersaver mode. That tends to underclock the system to conserve power.

The dxdiag thing told me that I was in fact using my nVidia card, as well as my power properties saying that my system was "Always On" so I'm assuming it's not underclocking me to do anything.

also try updating your video card drivers...... in Device Manager right click on the Geforce Go 7600 and click Properties, then select the Update Driver button. It won't hurt anything and it might help you out. Also defragging your hard drive and running a complete system virus scan would be good ideas too.

Have u checked if ur internet is messing up?

And you can also fix the refresh rate in the options ingame

That's weird, it fixed itself after the update, so I guess closed...