HiMy OS is Windows 7 Ultimate and I cannot load the J41 on aircraft load in FSX.The programmes crashes to an opaque screen and error messages raised for microsoft which I have sent.Have tried different combination in Manager but to no effect.have uploaded the latest Service Pack 1 fo FSX.Have loaded VS 2005 SP1.Have loaded latest Direct X.I am using triple core processor with 2gb ram.I would dearly like to fly this aircraft and impatient to see inside the cockpit.Has anyone any suggestions pleaseThanksBernie McKernan