Unknown Software Exception 0xe0434352

The top answer is great. Here are the site contents for when it goes down:

Often exceptions are thrown and caught and you don't see them. You probably know how to debug this in Visual Studio, so let me show you how to do it in cdb.

Nothing about an exception, but you're sure it's happening behind the covers -- fire up cdb:

C:\Program Files\Debugging Tools for Windows (x64)>cdb -pn consoleapplication3.exe

ModLoad: 000007fe`f7e90000 000007fe`f7eb4000
C:\Windows\Microsoft.NET\Framework64\v4.0.20506\culture.dll (ff8.17a8): Break instruction exception - code 80000003 (first chance) *** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\Windows\SYSTEM32\ntdll.dll - ntdll!DbgBreakPoint: 00000000`77b7d7b0 cc int 3 Continue debugging: 0:004> g

Exceptions - lots of them:

(ff8.16dc): CLR exception - code e0434352 (first chance)

(ff8.16dc): CLR exception - code e0434352 (first chance)

(ff8.16dc): CLR exception - code e0434352 (first chance)

(ff8.16dc): CLR exception - code e0434352 (first chance)

(ff8.16dc): CLR exception - code e0434352 (first chance)

(ff8.16dc): CLR exception - code e0434352 (first chance)

(ff8.1860): Break instruction exception - code 80000003 (first chance)

Break on CLR exceptions:

0:004> sxe clr

0:004> g

(ff8.16dc): CLR exception - code e0434352 (first chance)

First chance exceptions are reported before any exception handling.

This exception may be expected and handled.

*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\Windows\system32\KERNELBASE.dll - KERNELBASE!RaiseException+0x3d: 000007fe`fdb8bb5d 4881c4c8000000 add rsp,0C8h

Load sos ( in .Net 2/3 use use !loadby sos mscorwks):

0:000> !loadby sos clr

View Stack:

0:000> !CLRStack

PDB symbol for clr.dll not loaded

OS Thread Id: 0x16dc (0)

Child SP IP Call Site

000000000096e6a8 000007fefdb8bb5d [HelperMethodFrame: 000000000096e6a8]

000000000096e7c0 000007ff00170360

ConsoleApplication3.Program.ThrowAndCatchException()

000000000096e810 000007ff001701fb

ConsoleApplication3.Program.Main(System.String[])

000000000096ec90 000007feef474ca4 [GCFrame: 000000000096ec90]

View Exception:

0:000> !PrintException

Exception object: 0000000002c88c18

Exception type: System.NotImplementedException

Message: The method or operation is not implemented.

InnerException:

StackTrace (generated):

StackTraceString:

HResult: 80004001

0:000>

On my side I got really scared about this error, since nothing was working on my computer: Settings were closing when trying to open, Windows quick search was not working, Visual Studio was crashing with this error.

After two hours, I observed that I got a new keyboard language near the clock bottom right: it was ENG with . instead of the long name. I switched to the normal one, and boom: it looks like the keyboard language was somehow not supported by Windows: everything was then back to normal.

For the solution of this problem, 5 solutions have been proposed on the site below. https://thegeekpage.com/how-to-solve-unknown-software-exception-0xe0434352/

I tried 3rd of these and the problem is solved. However, I encountered a problem and the solution was as follows: After downloading "Download Microsoft .NET Framework Repair Tool from Official", an error message appeared stating that there was not enough space.
I extracted it to the folder with "7zip" software and ran "FixDotNet.exe" in that folder. The problem was resolved after the installation was completed. NetFxRepairTool-->FixDotNet.exe