Draftsight does not display using E-Machines Athlon with Windows 7 Home Edition

I've got Draftsight on two machines. One is an Intel based system running Windows 7 Professional - it works perfectly on that machine.

However, on an E-Machines Athlon machine (64 bit processor) running Windows 7 Home Edition - 64-bit, not a single .dwg drawing displays or does not display correctly. Is there a setting that I'm missing?

Thanks.