I been getting habitual 'apphangb1' freezes. I posted on the AVSIM CTD forum, no fix. I read the CTD guide, versions 1 & 2, no fix. I've google searched all over the place...no fix, no one has an answer.

I've been told it's not and FSX problem...HOWEVER,  FSX is the ONLY program of many I get this error, and most notably I only get it in the NGX, 99% of the time during the 20-second countdown aircraft initialization. Started the PMDG 747 QOTS II several times, no issue. No issue with the 777. No issue with Majestic Dash 8, nor any Carenado aircraft. No problem with FSLabs A320. But my preferred flagship; the NGX, is Apphangb1 city. I can get it going about 1 out of every 7-10 attempts.

My OS: Windows 7 64, Intel 4790 @ 4.9ghz, 16gb DDR3, 1080GTX in SLI, using an SSD, FSX in DX10 preview with Steves DX10 fixer, NVI Inspector profile. 

All drivers updated, directx libraries up to date, correct uiautomationcore.dll in main FSX directory, highmemfix=1 in FSX.cfg, memory tested/passed, Windows scanned for errors/missing .dlls, no errors. Due to not having any other program, app, or aircraft with the same error, I'm thinking either a repair or reinstallation of the NGX? Any thoughts or suggestions? Who's had this problem in the past, doesn't have it anymore, and what did you do to repair it? Thanks!

Do you have any FSDT, GSX or Flightbeam installed?  Your problem might be couatl.exe.  Kill it and see if problem goes away. Make sure you kill both couatl and its updater.

Do you have Active Sky? Update to the latest version, follow the docs to open the ports required on your router. Run fsx as administrator. Use an affinity mask setting in fsx.cfg for your cpu. Try 14 to start. - David Lee