Random "Event 1026 .NET Runtime" lead c0..05 P3Dv5.4 CTD

I feel this have been on me for years (while I have gradually moved to XP12 for main sim anyway)

The symptom is about 2~3hour in flight get a CTD and in the event viewer I see a Event 1026 .NET Runtime error like this one:

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
  <Provider Name=".NET Runtime" /> 
  <EventID Qualifiers="0">1026</EventID> 
  <Version>0</Version> 
  <Level>2</Level> 
  <Task>0</Task> 
  <Opcode>0</Opcode> 
  <Keywords>0x80000000000000</Keywords> 
  <TimeCreated SystemTime="2026-06-09T10:38:53.3705063Z" /> 
  <EventRecordID>98516</EventRecordID> 
  <Correlation /> 
  <Execution ProcessID="6168" ThreadID="0" /> 
  <Channel>Application</Channel> 
  <Computer>Umi</Computer> 
  <Security /> 
  </System>
- <EventData>
  <Data>Application: Prepar3D.exe Framework Version: v4.0.30319 Description: The process was terminated due to an unhandled exception. Exception Info: exception code c0000005, exception address 00007FFDED2123D0</Data> 
  </EventData>
  </Event>

And 1 seconds later:

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
  <Provider Name="Application Error" Guid="{a0e9b465-b939-57d7-b27d-95d8e925ff57}" /> 
  <EventID>1000</EventID> 
  <Version>0</Version> 
  <Level>2</Level> 
  <Task>100</Task> 
  <Opcode>0</Opcode> 
  <Keywords>0x8000000000000000</Keywords> 
  <TimeCreated SystemTime="2026-06-09T10:38:56.1479704Z" /> 
  <EventRecordID>98517</EventRecordID> 
  <Correlation /> 
  <Execution ProcessID="4604" ThreadID="20496" /> 
  <Channel>Application</Channel> 
  <Computer>Umi</Computer> 
  <Security UserID="S-1-5-21-1507506471-1515142045-11927022-1001" /> 
  </System>
- <EventData>
  <Data Name="AppName">Prepar3D.exe</Data> 
  <Data Name="AppVersion">5.4.9.28482</Data> 
  <Data Name="AppTimeStamp">6463925f</Data> 
  <Data Name="ModuleName">VCRUNTIME140.dll</Data> 
  <Data Name="ModuleVersion">14.44.35211.0</Data> 
  <Data Name="ModuleTimeStamp">0f259d81</Data> 
  <Data Name="ExceptionCode">c0000005</Data> 
  <Data Name="FaultingOffset">00000000000123d0</Data> 
  <Data Name="ProcessId">0x1818</Data> 
  <Data Name="ProcessCreationTime">0x1dcf7ee2026fc8a</Data> 
  <Data Name="AppPath">B:\Program Files\Lockheed Martin\Prepar3D v5\Prepar3D.exe</Data> 
  <Data Name="ModulePath">C:\Windows\SYSTEM32\VCRUNTIME140.dll</Data> 
  <Data Name="IntegratorReportId">8403ad19-4ac2-4a57-8292-b2689cb23f70</Data> 
  <Data Name="PackageFullName" /> 
  <Data Name="PackageRelativeAppId" /> 
  </EventData>
  </Event>

The .dll name is very random, this time is VCRUNTIME140.dll, but it have been terrain.dll, api.dll, ntdll.dll etc etc....but always 0xc0....05 exception code.

I have tried made full reinstallation of P3Dv5 before, still like this, and when I had enough I simply move to XP12....

Last weekend I thought since I not fly P3D that much, I now can uninstall many add-ons anyway, so I did , and give it a test (I still have some aircraft that's exclusive to P3Dv5 so I still want it work).

I got a PMDG747 set with some random long 10+hour route, LNAV VNAV in and went to work, and as I went back it still works!

I though maybe I got it, so next day I set a 2.5h route with PMDG747 and try properly fly it, and this time, 2 hour in to flight, CTD again.

but along with that, I also see 1026 lead c0005 with "ActiveSkyUtils.exe", emmm, that seems suspicious, as the last 10h+ test I didn't have ASP3D running.

So I disabled ASP3D in add-on.xml, fly same route again (with FSGRW), this time no problem.

I though I got it, and the next day I got another 3h+ flight without issue.

And to today, I though it'll be OK, but boom, 1.5h into flight, this again.

I tried to see if it's the .net runtime issue but Framework4 is integrated in win11 and I can't upgrade or repair it anyway.

While I'm thinking about make another full reinstall again this time add only minimum add-ons, the very nature of randomness makes this issue very hard to verify if it's gone, and I really don't mentally want put too much time in it as... I can always flee to XP anyway...