Win 8.1 on dimension 3100c

Hi

i'm trying to find out what I need to install after updating to win 8.1 on my dimension 3100c. my invoice says I have an intel media accelerator 900 vga graphics card on a pentium 4 machine. It was originally an xp 32bit machine.  can't find the drivers for this. I've managed to find safe mode although the instructions given by dell on how to do that were ridiculous and have followed the method to uninstall the d

rivers. The problem is I can't see that driver listed anywhere to uninstall it. I've done numerous diagnostics which either don't work or don't find anything wrong.the driver doesnt show in device manager or programmes or even listed under drivers in the windows file explorer. 

I can actually get into the computer to use it through task manager randomly and everything seems to function. It's just the front screen thats not working. 

Any ideas gratefully recieved!

Thanks