I have upgraded my G4.5 to G5. When I go to run G5 I get about 15 error messages start out the same and then only the last part is different. It says error opening o:\rfsim\image\rfv4auto.dckinfo The only thing that is different is the part after \image. I have all expansion packs installed as well.I also removed G4.5 thinking that was causing problems. I have installed it from the administators account as well as my windows account with the same results. But here is another wierd thing that happens this only happens when I log on to my user name. The program works great on my sons log in. I have uninstalled and reinstalled a few times with the same result.s One thing I notice when removing the program it only takes about 1 second and it says program removed sucessfully.I would think it would take longer then that. Also another interesting point is I have no o: drive on my computer. I have talked to realflight and they are supposed to be sending me a new disk to try. To me it seems the disk is working fine as the other accounts can use it OK. Anyone have any ideas? Thanks in advance for your help. Chuck