I downloaded the latest on line updates along with the WrightFlyer aircraft, and that was the beginning of my problems. I have had the system for over a year with no problems until now. The latest update said my files were corrupted and the airport scenery bore that out. I uninstalled the whole G2 installation and began again reloading. The main disk (CD) worked fine, but I cannot get the Add-On CD #3 to move into the set-up Wizard. It just freezes. Any ideas. Thanks in advance. JK