Just CTD again, this time during PreFlight.....I've never ever had CTD in any airplane until I installed Fs2crew...no erro, nothin....how to I diagnose it? 

what  does  your event  viewer  say

2 hours ago, pete_auau said:

what  does  your event  viewer  say

where do i find the info in the view. I just had another CTD this is the 4th time. I was just about to push too. 

4 hours ago, fakeflyer737 said:

where do i find the info in the view. I just had another CTD this is the 4th time. I was just about to push too. 

Did you dial back on your over-clocking?

We have quite a large user base now, and these random CTDs seem unique to your machine.

You can see BlackBox's videos where he's doing full flights...  no CTDs.

 

As experiment try a flight in Africa to be away from all the 3rd party AI traffic, 3rd party scenery and airports, etc.

Just see what happens.

 

And here's how to use event viewer:

https://www.howtogeek.com/123646/htg-explains-what-the-windows-event-viewer-is-and-how-you-can-use-it/

OK I found this

Log Name:      Application
Source:        Application Error
Date:          2019-07-18 4:53:43 PM
Event ID:      1000
Task Category: (100)
Level:         Error
Keywords:      Classic
User:          N/A
Computer:      DESKTOP-VK52FJV
Description:
Faulting application name: Prepar3D.exe, version: 4.5.12.30293, time stamp: 0x5cd47aad
Faulting module name: api.dll, version: 4.5.12.30293, time stamp: 0x5cd47b70
Exception code: 0xc0000005
Fault offset: 0x0000000000022cd6
Faulting process id: 0x3278
Faulting application start time: 0x01d53da81a7586c3
Faulting application path: F:\Prepar3D v4\Prepar3D.exe
Faulting module path: F:\Prepar3D v4\api.dll
Report Id: dd3bf70e-93dd-4b9b-9842-42e121d361d7
Faulting package full name: 
Faulting package-relative application ID: 
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Application Error" />
    <EventID Qualifiers="0">1000</EventID>
    <Level>2</Level>
    <Task>100</Task>
    <Keywords>0x80000000000000</Keywords>
    <TimeCreated SystemTime="2019-07-18T20:53:43.228745800Z" />
    <EventRecordID>26570</EventRecordID>
    <Channel>Application</Channel>
    <Computer>DESKTOP-VK52FJV</Computer>
    <Security />
  </System>
  <EventData>
    <Data>Prepar3D.exe</Data>
    <Data>4.5.12.30293</Data>
    <Data>5cd47aad</Data>
    <Data>api.dll</Data>
    <Data>4.5.12.30293</Data>
    <Data>5cd47b70</Data>
    <Data>c0000005</Data>
    <Data>0000000000022cd6</Data>
    <Data>3278</Data>
    <Data>01d53da81a7586c3</Data>
    <Data>F:\Prepar3D v4\Prepar3D.exe</Data>
    <Data>F:\Prepar3D v4\api.dll</Data>
    <Data>dd3bf70e-93dd-4b9b-9842-42e121d361d7</Data>
    <Data>
    </Data>
    <Data>
    </Data>
  </EventData>
</Event>

I just reinstalled fs2crew, updated realtik drivers and a bunch of other stuff and soon as i pressed run pre flight events it ctd and no error is posted 

Faulting module path: F:\Prepar3D v4\api.dll

Please see this:

https://www.google.com/search?q=p3d+v4+api.dll+ctd&oq=p3d+v4+api.dll+ctd&aqs=chrome..69i57j69i60.6399j0j7&sourceid=chrome&ie=UTF-8

 

Personally I think your computer has problems.  I would suggest a clean format and re-install of Windows.