Actually windows 7 works just fine I just keep getting a message when I open solitaire that reads:
"Hardware acceleration is either disabled or not supported by your video card driver, which could cause slow game performance. Make sure you have the latest video card drivers installed and that hardware acceleration is turned on"
I've also found graphics drivers for a similar pc from HP that supports windows 7. The D530 desktop from HP has very similar specifications to the Acer Veriton 7600GT. And an identical onboard graphics card.