mgrimm

I heard MS did another update on November 30, 2017. I ended up rolling my windows back to Windows7.. works great no issues, I have no time for Windows10. Windows7 will be good until 2020 Mike

I rolled back to Windows7 as it is still good until 2020. I got tired dealing with the error as I'm sure there is more to come with MS as they have plan another update in early spring that will probably change everything again.. Windows7 have no issues enjoying life. Mike

Every computer is different. In P3D V3.4 its automatic that the Net.Frame is set for 4.0.. Good Luck it worked for me and my brother.

Guy.. this post did not work for me but, I did find a fix.. You need to go into your simulator Lockheed Martin Double click on Prepar3D v3 scroll down until your find Prepar3D.exe.comfig open with note pad and it needs to read this: <?xml version="1.0"?> <configuration> <startup useLegacyV2RuntimeActivationPolicy="true"> <supportedRuntime version="v4.7" sku=".NETFramework,Version=v4.7"/> </startup> </configuration> one this part is done it save. and put check mark back in the NET.Frame: see step 4 in this thread.. I'm back in business Works for me.. :)