Video card not showing up in dxdiag

Okay, I'm not much of a computer whiz, so I'll try to relay my issue as best I can.

Earlier, our computer was having serious virus issues. Just a few days ago, xp just reinstalled itself basically. I have no idea why, but it seems to have cleared out the viruses and all that jargon.

I decided to try and play some WoW, and noticed that it wouldn't load due to it not finding a suitable display device. I opened dxdiag and in the 'Display' tab all I see is n/a about everything.

I've been reading threads about this and I'm pretty sure I need a graphics card driver or something installed? I know that my video card was an ATI Radeon Family... I can't remember the exact numbers after it. Here's some specs about my computer:

OS: Microsoft Windows XP Home Edition (5.1, build 2600)
manufacturer: emachines
model: t5226
BIOS: Default System BIOS
Processor: Intel Premium D CPU 3.00GHz (2 CPUs)
 
You or someone will have to open the PC and pull out the card to look at it to determine the model number. The basic specs of that Emachines that I looked up show an integrated Intel graphics solution so what other card might have been installed is anyone's guess.
 
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