I downloaded sp1 and installed it, it said it worked and then when I started fsx I had a ctd. Nothing worked at all. I tried several times and had the same result.?HELP.. thoughtI have a good quality machine , tons of capacity and power. FSX ran pre sp1 at around 15fps on average settings. PeterPeter K P.EngCF-MMZToronto Ontario CanadaPMDG 747,737and 747FLevel D 767PSS Airbus pro A340-300In reality, a Mooney 201 Pilot

Did you update FSUIPC? I had a couple of CTDs with Sp1 until I discovered the newer version by Peter Dowson for sp1.There could be other issues, like 3rd party incompatible dll files. Go slowly on adding stuff to FSX. Start with the default and build slowly. Make sure everything is set properly in your rig. I rcommend a clean re-install, from scratch, and then install sp1.Lee

>Did you update FSUIPC? I had a couple of CTDs with Sp1 until>I discovered the newer version by Peter Dowson for sp1.>>There could be other issues, like 3rd party incompatible dll>files. Go slowly on adding stuff to FSX. Start with the>default and build slowly. Make sure everything is set properly>in your rig. I rcommend a clean re-install, from scratch, and>then install sp1.>>LeeI will try removing fsxand sp1then install fsxsp1then fsuipc 4.10 Thanks for the advice. hope it works. Pete