Hi everyone! I'm new to the forums and this is not the type of first post I wanted to make. I'm asking for help with 737NGX that I recently purchased. I know there is massive amounts of information on this website and other websites along with PMDG documentation however... the reason I am asking for help on this website is because the community here has experience, a lot of experience. I can't tell where the problem lies, my computer, setup procedure, computer/FSX settings or something else. Before I try ******* Altuve's fix or any other modifications I want to make sure I didn't do something wrong in the first place. So, here goes:During the installation everything was fine until I had to let it install Direct X. It crashed maybe 10 seconds into it. I pretty much ignored it and decided it would be a good idea to uninstall the PMDG planes and then re-install. So the 2nd time I installed it, I just stopped the installer from getting Direct X. When I started FSX afterwards, there were maybe 4-6 popups saying "Should I allow this program to run" and it was all PMDG related, so naturally I said yes. When I select the PMDG 737NGX (any of them) from Free Flight screen, it lags FSX, takes like 30 sec for the plane to load, I get a black screen in the preview window. Eventually it loads like other planes and I start in the virtual cockpit, I get around 5-12 FPS. If I go outside of the plane I get around 25-35. Even with REX running. My system meets the requirements for these planes so I don't know if I installed it wrong because of the problems I ran into, or if its my computer. Also as soon as the loading is over there is a green bar "initializing systems" and during this time my FPS is around 2-5.Here are my Specs:Windows 7 Home Premium 64-bitIntel® Core2 Quad CPU Q9650 @ 3.00GHz (4 CPUs)6144MB RAMDirectX 11GeForce GTS 240 1GBI was thinking that windows firewall might be blocking some of the PMDG files and thus creating a mess. It could even be direct X. Or maybe I should re-install FSX into C: folder? I just don't know where to start, that's mainly why I am posting here.-George

Hi George,I had the exact same issue. I guess Windows 7 is not too keen to have an older directx version installed.One solution is to delete the contents of c:windowssyswow64directx (I'm writing this at work so forgive any mistakes) download the directx webinstaller from microsoft and see if that works. If it doesn't, download the directx runtime files and install those. If that doesn't work, install the whole damn directx sdk package (about 650 MB). That did the trick for me.Sorry I don't have any links.Keep FSX on a different partition from C:Windows 7 will inform you when the firewall is blocking things.Hope this helps

The DirectX stuff is required for the plane to run - if it's not installing properly, it's a Windows problem - that file's made by MS, not by us. I've spent hours trying to find a for-sure solution to this, but there doesn't seem to be one. Certain things have worked for some people but others have been forced to reformat to fix it.

Thanks for the quick responses!!Hey mbunjes, should I uninstall FSX or PMDG 737ngx before I download Direct X most recent version? Or it doesn't matter?

No, there's no need to uninstall the NGX, However, it's not the latest version of directX you need,Just try this link after emptying C:WindowsSysWow64directxwebsetup:http://www.microsoft.com/download/en/details.aspx?id=35See if that works. You can try and run the NGX setup again after the webinstaller and see what it says.If it doesn't work, come back here and we'll try something else.

Amazing! It worked!!!!!!!!!!!!!!!!! I followed your steps and now I have much better frame rates. Also the black preview screen is GONE. And the load time for the plane is much faster. I am getting 12-30 FPS now in VC.I still have lag during the system initialization, but it goes away after 10 sec or so. I am SOOO excited.Should I go ahead with ******* Altuve's optimzation program following the PMDG instructions?Thank you so much!-George

Glad it worked. By all means use *******' tweak.Happy landings !