Hi. Use Windows 7 Service Pack 1 and P3D v.3. I have installed "gsx". When the simulator first starts, the following warning appears: "Can not launch the application correctly (0x000007b). Close the application". I've followed some instructions to fix the problem, finding it in the web, but failing. Lastly, I deleted the MSVCR100dll and MSVCP100.dll files from windows \ system32 (in windows \ system there were no); I downloaded and installed MICROSOFT VISUAL C ++ 2010 REDISTRIBUTABLE PACKAGE_x86. Thanks for the attention.