since installing 737ngx i have been running fsx and the ngx with no problems,until yesterday when fsx wouldnt start i got a appcrash pmdg 737 dll as the fault. i deleated the ngx and fsx started ok i then installed the ngx and it was working fine for awhile then i got the appcrash again, i again deleated ngx deleated the fsx config started fsx ok then done the ******* tweaks installed ngx set up as per introduction manual and now running fsx and ngx, with no problems so far, i know some users have had trouble when closing fsx but any help why i keep getting a appcrash when starting fsx thanks in advance.

What did the event viewer say about the crash?

DescriptionFaulting Application Path: C:\Flight Simulator X\fsx.exeProblem signatureProblem Event Name: APPCRASHApplication Name: fsx.exeApplication Version: 10.0.61472.0Application Timestamp: 475e17d3Fault Module Name: PMDG_737NGX.DLLFault Module Version: 1.0.0.0Fault Module Timestamp: 4e3afb98Exception Code: c0000005Exception Offset: 00057590OS Version: 6.1.7601.2.1.0.768.3Locale ID: 2057Extra information about the problemLCID: 2057

again deleated ngx deleated the fsx config started fsx ok then done the ******* tweaks installed ngx set up as per introduction manual and now running fsx and ngx, with no problems so far,

Sorry but im confused did you say it is running without problems after the install?

yes it is running ok now, but it worked for a short time after the last install.

It might of been the fsx.cfg if it runs fine now. A good idea that if follow is to if i have a crash i delete my .cfg and let fsx create a virgin .cfg. It also could of been something that the reinstall fixed. I gained 10 fps from reinstalling and using a aftermarket defrager.

yes i deleated the fsx config and let fsx create a new one, ill see how it goes and report back. thank you