This hasn't been answered for a while, but in case your still following this. Here might be an option. If your motherboard has integrated video and the integrated video is not the GeForce 7100 GPU, your integrated GPU might be supported by 10, however if your integrated is a weaker GPU, you will take a performance hit.
Otherwise get a card from a friend that might be a free upgrade or buy a cheap card until you can afford a better one if you must be on 10 vs 7.