Windows 10, Microsoft Office 2016 Appliation crash automatically after open

Dear all,

I am working on a issue one of our users, where when he open up any office program, it will close within 5 seconds and generate the below error :

Application: OUTLOOK.EXE
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.IO.FileNotFoundException
at CASConnHostAddIn.ThisAddIn.OurInitialization()
at System.Threading.ThreadHelper.ThreadStart_Context(System.Object)
at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
at System.Threading.ThreadHelper.ThreadStart()

Faulting application name: OUTLOOK.EXE, version: 16.0.4266.1001, time stamp: 0x55ba17b9
Faulting module name: KERNELBASE.dll, version: 10.0.17763.652, time stamp: 0x57e2061a
Exception code: 0xe0434352
Fault offset: 0x0011fd82
Faulting process id: 0x14ec
Faulting application start time: 0x01d5585da1512d28
Faulting application path: C:\Program Files (x86)\Microsoft Office\Office16\OUTLOOK.EXE
Faulting module path: C:\WINDOWS\System32\KERNELBASE.dll
Report Id: 5e5587b5-92a4-430e-8c80-aca33a73696b
Faulting package full name:
Faulting package-relative application ID:


  1. This PC is running on Windows 10 Pro version 1809.
  2. I tried running a repair from Add/Remove Programs
  3. I tried to uninstall and reinstall the application
  4. Run Sfc/ scannow
  5. Wiped away the user’s profile and rebuilt it
  6. The only thing I have not done is reinstalled the OS which I don’t want to do.

Hope someone help me solve this issue


Hi @logan5,

Please uninstall the Microsoft Office 2016 software from your device and refresh your Windows 10 using the Windows 10 image. If you are not sure what is refresh download the Windows 10 iso file from the internet. Double clicking the iSO file will mount the image in Windows 10 as you can see in the below picture. Now open the setup file and follow the on screen instruction. That’s it

Once the Windows 10 Refresh is completed try again to install the Microsoft Office 2016 software I hope you will not have the same issue again.


1 Like

Try to run Microsoft Office removal tool in your PC. This tool will wipe all of your Microsoft Office related files in your PC. Some time previous Office leftover files also cause this type of issue. Please follow the below method to use Microsoft Office Removal Tool.

Using Microsoft Office Removal Tool

Step 1

Download the Microsoft Office Removal Tool . The Office Removal Tool should work for any version of Microsoft Office (Office 2007, Office 2013, Office 2016, Office 365) on any modern version of Windows (Windows 7, Windows 8/8.1, Windows 10)

Step 2

Open the Microsoft Office Removal Tool and follow the instructions as prompted. Once the process is completed, go ahead and restart your system. Microsoft Office should be completely removed.


1 Like