Alright lads here is what I had to be dealing with for the last 6 months, with the past week being the most catastrophic.

Fsx steam crashes to desktop with different causes simultaneously, with these 2 DLL files causing me and my best friend major headaches (which he gave up so I'm on my own).

Here are both of the logs from event viewer

1.

Faulting application name: fsx.exe, version: 10.0.62615.0, time stamp: 0x559f9a9a
Faulting module name: MSVCR80.dll, version: 8.0.50727.9680, time stamp: 0x6090c909
Exception code: 0xc000000d
Fault offset: 0x00008aa0
Faulting process ID: 0x0x97AC
Faulting application start time: 0x0x1D91A5A650676FD
Faulting application path: C:\Program Files (x86)\Steam\steamapps\common\FSX\fsx.exe
Faulting module path: C:\WINDOWS\WinSxS\x86_microsoft.vc80.crt_1fc8b3b9a1e18e3b_8.0.50727.9680_none_d090cb7c44278b28\MSVCR80.dll
Report ID: 1f2b9d8f-7ba2-4da0-acc2-ddbe8278a7f8
Faulting package full name: 
Faulting package-relative application ID: 

2. 

Faulting application name: fsx.exe, version: 10.0.62615.0, time stamp: 0x559f9a9a
Faulting module name: API.DLL, version: 10.0.62615.0, time stamp: 0x559f9ab5
Exception code: 0xc0000005
Fault offset: 0x000b8fbf
Faulting process ID: 0x0x4E3C
Faulting application start time: 0x0x1D91B162A7B8CE9
Faulting application path: C:\Program Files (x86)\Steam\steamapps\common\FSX\fsx.exe
Faulting module path: C:\Program Files (x86)\Steam\steamapps\common\FSX\API.DLL
Report ID: b2234b5c-638e-4955-8d78-cd6b5a8bfc90
Faulting package full name: 
Faulting package-relative application ID: 

 

I had this problem for so long that I knew these solutions won't help:

- reinstalling fsx

- reinstalling/updating Microsoft Visual C++ Redist (all of them)

-  Turning off all addons

 

If anyone can help or call me out for being an absolute doofus, please do as I can turn it into a life lesson.

Thanks.

Hi,

 

The MSVCR80.dll CTD indicates that you are running an outdated or corrupt version of the C++ libraries.

 

Check out this link: https://www.techpowerup.com/download/visual-c-redistributable-runtime-package-all-in-one/

 

The API.dll error is a very complex CTD to solve, as it can point to many different things. According to the exception code your sim is trying to read or write a file (or folder) that it either can't find or doesn't have access to.

I recommend this topic: 

 

 

Also, try running fsx with Process Monitor in the background and tell me that last file it tried to read or write or any other action it did prior to an API.dll CTD.

 

-jessy