I just installed mine this week. If you have an EQ6 upgrade, EQ5 will have to be installed first. If you get an error message saying EQ6 could not initialize, go to the Program Files, Electric Quilt Company, open the EQ6 folder and look for the red and white EQ6.EXE file (it's an application file). Right-click on it and choose Run as Administrator in the menu. Click Allow. Sometimes it helps to read the "Read Me First!" instructions before installing. Ask me how I know!