Problems Installing Demo Version of Unity

Here is the reply from our school tech. She was trying to install the demo version of Unity for use by our school Game Creation Club.

I was not successful in getting this software to run on these 3 computers. I think it will run on #10, but not 11 and 12. I constantly get a "Failed to initialize 3D graphics. Make sure you have DirectX 9.0c installed and have drivers for your graphics card and have not disabled 3D acceleration in display settings" message.

I have DirectX 9.0c installed but I think the problem may be a particular graphics card is needed to run this. This application is well over 1GB. I spent an hour and a half trying to get it to run.

I think it is an Intel G41(intel) Graphics card for Windows XP

Any suggestions on how to get this to install or if it is not possible? Thanks, Steve