Windows 10: Windows Explorer crashing with code 0xc0000409

Hello,


I have recently been having issues with start up. A couple of days ago, the power went out while the system was shut down but with fast startup enabled, if that matters at all. I turned my system on the next day and Explorer kept crashing on startup. I went into the recovery environment and tried to do a sfc /scannow, but forgot I had to disable fast startup if I wanted to do that. So I went back into Windows and waited and eventually Explorer stopped crashing. I went into Event Viewer and noticed there were a bunch of errors. They are all the same error, but the error is: Faulting application name: explorer.exe, version: 10.0.19041.546, time stamp: 0x89ce2e55

Faulting module name: ucrtbase.dll, version: 10.0.19041.546, time stamp: 0x43cbc11d

Exception code: 0xc0000409

Fault offset: 0x000000000007287e

Faulting process id: 0xf6c

Faulting application start time: 0x01d6aaf8f586b559

Faulting application path: C:\WINDOWS\explorer.exe

Faulting module path: C:\WINDOWS\System32\ucrtbase.dll

Report Id: f61e6a8c-41cd-4d94-b8e7-df6fe451c809

Faulting package full name:

Faulting package-relative application ID:


I eventually got a sfc /scannow and that did nothing. Also tried a dism /online /restorehealth. Still nothing. The system boots fine in safe mode, but explorer crashes when I click on the desktop. I was on 20H2, but eventually this got so bad that the Start menu would not open whenever I clicked the start button a critical error window would pop up. I have also tried replacing the ucrtbase.dll and explorer.exe from an install USB created using the official tool, but still no luck.

:)

 

Explorer.exe crashes Exception code: 0xc0000409

Welcome to TenForums!

You might want to take a peek at your Reliability History report and see if the error has been reported. You are able to view technical files related to the incident as well with that tool.

Just start typing "Reliability" in your search field in the task bar, and it will bring up the View Reliability History in the results and you just click on it.

As you can see, I'm currently dealing with one from RoboForm; but the reliability history viewer reports that it was reported:

 

Windows explorer crashing

Hi,

I am having the same problem as the OP in this thread.
Windows Explorer crashes whenever I open my external HDD or thumb drive in explorer..

I have tried the fixes listed in the above thread and I am getting the same error message as 'ktadie' (post 16). I think this is because I am running Windows 7 Professional. Windows explorer crashes when I open my 'Films' folder on my brand new 2tb external HDD. I have about 300 .avi files in this folder and some of the .avi files are several years old.

In short I believe I need the same fix given by 'Wile E' (post 7) but updated for Windows 7 Professional.

Thanks in advance.

 

Explorer.exe crashes Exception code: 0xc0000409

PowerShell was not mentioned in that link I posted, so I'm not sure; but according to your prior posts, the evidence is clearly there that points to a Start Layout problem causing Explorer.exe to crash.

However; what is exactly causing it (Explorer.exe to crash) is a matter of having a steps recorder program that can isolate the exact culprit unless someone knows what all the trouble code alphanumeric numbers mean.

Their are virtually hundreds of fixes posted on how to fix Explorer.exe; however, the right one for your situation is better left to those with verbose in using the PowerShell Command.