contact pfaff, or the dealer where you purchased your machine. when i purchased my viking i had to get a download (like an adobe reader) to read the correct downloads for the machine. it should be free and pretty easy to take care of, unless your computer is getting old and it is time to update :) i finally had to break down and buy a new computer, although my desk top still worked just fine, there were some things it just did not have the capabilities of anylonger...technology speeds forward and our computers stay where we keep them...but no matter what you have to have the correct (reader) to use the machine software