Do you currently have other SOS curriculum? If you do just install the discs on the same computer using the newer serial numbers. This worked for me! Do you happen to have the 10th grade history? My disc A broke for history 10 2001 and I can't print my sons tests! It is very hard to find. I have tried buying it but now I am just looking for anyone that might make me a copy to print his tests!Hope this helps.