Hi Fellow Simmers,I have been watching these forums quite frequently over the years and have come to the conclusion that FS9 crashes are mainly due to bad video card driver installations. Sure, there are crashes due to corrupted FS9 configuration files, memory leaks, or hard drive problems but if you have a CTD, you should immediately suspect your video card drivers even if your system is reporting your drivers are properly installed.I had a CTD the other day, my first in many, many years of flight simming. Whenever I opened the kneeboard and clicked anywhere on the window, the system crashed. Everything else within FS9 worked and I had great frame rates, and great resolution. I also received an "out of memory" error while landing at KATL (1 gig of memory installed) even while FS9 was reporting FPS above 30. The error reports gave me no clues as to the cause. I checked the Device Manager and made sure all my Display Adapter/Video Card drivers were installed (I have the new Radeon X800 XT PCI Express card). They were. I ran the DirectX program and made sure there were no problems identified. None were identified and all drivers were installed. I uninstalled/reinstalled FS9 and the problem continued to exist even before I began to reinstall all my addon's. I became frustrated. Then I decided to "manually" reinstall the ATI video card drivers (i.e., going into the Device Manager and updating the drivers). I told it to reinstall exactly the same drivers already installed. That solved my problem. Evidently my system registry didn't have all the proper video card settings or it became somehow corrupted. FYI, I followed ATI's instructions for uninstalling/reinstalling their drivers. I even went into the registry and made sure it was clean of ATI entries before running the ATI install program. I did this procedure twice and still received the crashes. It wasn't until I manually reinstalled the drivers that my CTD problems were fixed.So, the bottom line: don't trust what your system device manager or DirectX is telling you if you have a CTD. Reinstall those video card drivers and keep reinstalling until the problem is fixed.I sure hope this helps someone else. Ciao,Jim

Jim,I can only hope that is my problem. I've uninstalled and reinstalled so many different drivers for my new video card (nVidia FX 5700 LE - lame card I know but I'm poor) that I'm going mad. My problem is with flickering textures. I thought those only existed back in the drivers pre 53.03 and such. But when I load my planes, streaks shimmer off the wing tips and the scenery jumps everywhere. I've seen a post about a driver remover program. I'm going to use that when I get home. I'm starting to run out of ideas though. If anyone can help, I'd love to hear. Here are my specs:AMD Athlon XP 2100+764 MB PC3200 DDR RamnVidia FX 5700LE 256 MB vid cardBiostar K7VIT MoBoFS9Windows XP Pro SP2DirectX 9.0cThese are the drivers I have tried:nVidia 66.93nVidia 67.50Omega 1.6177nVidia 53.04 (wouldn't install for some reason)nVidia 71.50 betaThese are the other things I have tried:Anti-aliasing: on and offAnisotropic filtering: on and offRender to texture: on and offVSYNC: on and offFS9: windowed and non-windowedMip mapping: all settingsRefresh rates: anything between 60 and 100 HzWhat I haven't tried (and will try tonight):Looking at the FS9.cfg for weirdnessDriver removal programOverride refresh rates in dxdiagAny thoughts are welcome. Thanks.Neal

Hi Neal,The latest Driver Cleaner was released just today. Get it . Follow the Readme for your nVidia card and it will scrub your registry clean of any errant entries.While some folks claim to have great luck with the "latest" video drivers, others aren't so fortunate. Once you've got your registry cleaned with Driver Cleaner you might consider going back to a set of drivers that worked for you in the past.Also, it might be time for a "new" FS9.cfg. Cruachan does a great job of explaining how to do the job in [link:forums.avsim.net/dcboard.php?az=show_topic&forum=177&topic_id=676&mesg_id=676&page=|this] thread.Finally, see my post #12 [link:forums.avsim.net/dcboard.php?az=show_topic&forum=197&topic_id=2504&mesg_id=2504&page=]here for cleaning your system of the many monitors it will have. Always use your monitor manufacturer's drivers even if they are older than Microsoft's.Hope this helps,Greg