Help with ShuttleXPC

I just bought a Shuttle XPC SB51G. I'm building this pc for my little brother who only use it for school work and surfin the net. I decided not to get a video card and use the onboard Intel 845G graphic chipset instead. My problem is that whenever I install the video driver everything works out just fine. After I turn off or reset the PC, the onboard Intel graphic adapter disappears and windows XP tells me that it found a new VGA adapter and defaults to it. I tried going into the display setting to adjust the display properties, but I just see the generic VGA adapter instead of the Intel one. Another weird thing is, In Device Manager, the display adapter displays the onboard Intel 845G. After I uninstall this adapter and reinstall the Intel driver, everything works fine again. But like I said, after I turn off or reset the PC, the onboard Intel graphic disappears again! I'm been playing with it for hours and just about to give up and go buy a video card. If anyone came across this problem can help out, I'll be greatly appreciated.

The system:
Shuttle XPC SB51G
Intel Celeron 2.6Ghz
Corsair 256mb DDR333
Seagate 80gig HD
Memorex 52X24X52X CDR
Windows XP Home Ed.

DCB is probably right. Look in the bios and see if the onboard video is disabled

Check registery for errors. The easiest way to fix these faults if your not a technician is to first - try this.

On a new formatted partition instal your O/S (dual boot) and see if the fault occurs. If it's fixed, you know the problem.

If its not, it is probably but not limited to a bios fault.
Also, note that sometimes you have to flash or upgrade the bios twice - first time does not always work.

<font color=red>DCB</font color=red><font color=white>_</font color=white><font color=blue>AU</font color=blue>