So, just for info.I formated my SSD, then installed fresh windows7 x64 with SP1 and latest update, fresh FSX (c:\FSX), boyote tweeak....etc.But now, I have more CTD when I choose end to flight !!! Blahh.So, I hope SP1 will fix it.

Hello Ivo,This information is useless unless you have some crash information.I also recently reinstalled with a new mobo CPU and RAM and one CTD caused by atc.dllplease post the information from the event viewer (eventvwr -> Windows Logs -> Application.)

oh, here are some logs : Faulting application name: fsx.exe, version: 10.0.61472.0, time stamp: 0x475e17d3Faulting module name: PMDG_737NGX.DLL, version: 1.0.0.0, time stamp: 0x4e4a3aefException code: 0xc0000005Fault offset: 0x00015153Faulting process id: 0x1270Faulting application start time: 0x01cc6be95ca0632bFaulting application path: C:\FSX\fsx.exeFaulting module path: C:\FSX\GAUGES\PMDG_737NGX.DLLReport Id: 3bfd2109-d7dd-11e0-9353-90e6ba575470 Faulting application name: fsx.exe, version: 10.0.61472.0, time stamp: 0x475e17d3Faulting module name: MSVCR90.dll, version: 9.0.30729.6161, time stamp: 0x4dace5b9Exception code: 0xc0000005Fault offset: 0x000726f4Faulting process id: 0x6d0Faulting application start time: 0x01cc6be5cb1b0cc3Faulting application path: C:\FSX\fsx.exeFaulting module path: C:\Windows\WinSxS\x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.6161_none_50934f2ebcb7eb57\MSVCR90.dllReport Id: 54f11379-d7d9-11e0-9353-90e6ba575470 Faulting application name: fsx.exe, version: 10.0.61472.0, time stamp: 0x475e17d3Faulting module name: PMDG_737NGX.DLL, version: 1.0.0.0, time stamp: 0x4e4a3aefException code: 0xc0000005Fault offset: 0x00015153Faulting process id: 0x116cFaulting application start time: 0x01cc6be0bff18745Faulting application path: C:\FSX\fsx.exeFaulting module path: C:\FSX\GAUGES\PMDG_737NGX.DLLReport Id: 40ebf807-d7d4-11e0-af17-90e6ba575470 Faulting application name: fsx.exe, version: 10.0.61472.0, time stamp: 0x475e17d3Faulting module name: MSVCR90.dll, version: 9.0.30729.6161, time stamp: 0x4dace5b9Exception code: 0xc0000005Fault offset: 0x000726f4Faulting process id: 0x21cFaulting application start time: 0x01cc6bdbe8da830cFaulting application path: C:\FSX\fsx.exeFaulting module path: C:\Windows\WinSxS\x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.6161_none_50934f2ebcb7eb57\MSVCR90.dllReport Id: 0ac40e3f-d7d0-11e0-af17-90e6ba575470