I just roled back to Nvidia driver 566.36 (no NVIDA app installed!) and still the sim refuses to start... The blue bar gets to around 50%, then the sim shuts down... So, please help me! I dont know how to solve this, what can i do? 

Best regards 

Pelle 

I ran into this issue a few weeks ago and unfortunately the only thing that fixed it was reinstalling the sim...I know....not what you want to hear. 

Before you do that though, run through the usual checklist of things to try like clearing DX cache and the below scripts.  Also, try booting with a clean Community folder.

---------------------------------------------------

Dism.exe /online /Cleanup-Image /CheckHealth

Dism.exe /online /Cleanup-Image /ScanHealth

Dism.exe /online /Cleanup-Image /Restorehealth

sfc /scannow

Dism.exe /Online /Cleanup-Image /AnalyzeComponentStore

Dism.exe /Online /Cleanup-Image /StartComponentCleanup

28 minutes ago, buspelle said:

I just roled back to Nvidia driver 566.36 (no NVIDA app installed!) and still the sim refuses to start... The blue bar gets to around 50%, then the sim shuts down... So, please help me! I dont know how to solve this, what can i do? 

Best regards 

Pelle 

steam or microsoft version if its steam check the library section, look down to msfs2020 and see if its  a sync issues with the cloud server

I just did a clean install of the Simulator, are there any other ways to solve the problem do you think? 

Does your computer have the correct date and time?

I have the store version of the Simulator... 

Yes, correct time and date... 

DX11 or DX12?  It appears DX11 w/TAA will also cause a crash regardless of Nvidia App installed

Should I try another Nvidia driver? Or are there any other tweaks I can do to solve this issue...

I remember a fellow who helped me with this problem some months ago, but I can't seem to find that old post, and I don't remember how I did to fix this issue... 

1 minute ago, buspelle said:

Should I try another Nvidia driver? Or are there any other tweaks I can do to solve this issue...

I remember a fellow who helped me with this problem some months ago, but I can't seem to find that old post, and I don't remember how I did to fix this issue... 

just go to your profile and check your posts

I can't get into the Simulator to see if I have dx11 or dx12, and I don't have the Nvidia app installed, since I remembered that that was the problem before... Are there any other ways to see if I have dx11 or dx12? 

Sorry for being stupid and novice, but I was looking for that Old post that I made a few months ago regarding this problem, but I can't find it, how do you look for your older posts in this Forum?

3 minutes ago, buspelle said:

Sorry for being stupid and novice, but I was looking for that Old post that I made a few months ago regarding this problem, but I can't find it, how do you look for your older posts in this Forum?

see my post above yours 

Edited September 26, 2025Sep 26 by pete_auau

Posted 20 hours ago (edited)

Credit to AI and because I have seen this posted here before, not my information but you can do it outside the sim... 

To change MSFS to DX11, edit the UserCfg.opt file by finding the line PreferD3D12 1 and changing the 1 to a 0 using Notepad, then save the file. Ensure the UserCfg.opt file is not set to read-only before making the change. 

 

Here's a step-by-step guide:

1. 1. Locate the UserCfg.opt file:

   • Navigate to the following path in File Explorer: `%LocalAppData%\Packages\<<!nav>>Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\`. 
      
   • Find the UserCfg.opt file in this folder. 
      
2. 2. Check the Read-Only attribute:

   • Right-click the UserCfg.opt file and select Properties. 
      
   • On the General tab, make sure the Read-only attribute is unchecked. If it's checked, uncheck it and click Apply then OK. 
      
3. 3. Edit the file:

   • Right-click on the UserCfg.opt file and choose Open with > Notepad. Do not use Wordpad, as it can corrupt the file. 
      
   • Look for the line that says PreferD3D12 1. 
      
   • Change the 1 at the end of the line to 0 so it reads PreferD3D12 0. 
      
4. 4. Save the changes:

   • Click File and then Save to save your changes to the UserCfg.opt file. 

Edited September 26, 2025Sep 26 by psolk

Thank you so much for this tip! 👍 I will try that in an hour, I am a little busy with other things for the moment, but I will try and get back here as Sun as possible! You all are so kind and helpful!!!🌹

I get back soon with the report of my status 👍