Microsoft Outlook Application Crash due to UCRTBASE.DLL

Anonymous
2020-12-07T17:43:25+00:00

Windows 10 Build 2004

Outlook crashes intermittently and generates the following Application Event Log error.

Event 1000, Application Error (11:06AM, 12/7/2020) Faulting application name: OUTLOOK.EXE, version: 16.0.13426.20308, time stamp: 0x5fc6ea9b Faulting module name: ucrtbase.dll, version: 10.0.19041.546, time stamp: 0x73123758 Exception code: 0xc0000409 Fault offset: 0x0009edbb Faulting process id: 0x41c0 Faulting application start time: 0x01d6ccaedccaa9fa Faulting application path: C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE Faulting module path: C:\WINDOWS\System32\ucrtbase.dll Report Id: f8791f7b-faf7-452a-8ff2-7268662a6db2 Faulting package full name: Faulting package-relative application ID:

I have run SFC /SCANNOW

I have completely uninstalled and reinstalled Microsoft Office 365

Here are the properties of the failing file:

Windows for home | Windows 10 | Performance and system failures

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  1. Anonymous
    2021-01-15T16:29:14+00:00

    I have a user that we will be doing the same for. Fingers crossed!

    Thank you.

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  2. Anonymous
    2021-01-15T16:56:22+00:00

    Sophos here as well.

    Will run some tests here on Monday.

    Thanks for updates all.

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  3. Anonymous
    2021-01-15T17:47:19+00:00

    Sophos here as well.  I will be interested in knowing if disabling Sophos resolves this.  I will open a case with Sophos if we have some evidence that this may be the case.

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  4. Anonymous
    2021-01-15T20:52:19+00:00

    Running Sophos Endpoint here as well. Out of 50 people, only 1 has indicated this is an issue. They are using spinning HDD.

    I've tried installing the latest Visual C++ Redistributable, reinstalling Office 2016, and applying all Windows Updates/driver updates.

    I will look into Sophos as well.

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  5. Anonymous
    2021-01-17T19:21:59+00:00

    Latest test results with Sophos completely turned-off: no new crashes of Outlook.

    I just created a support ticket by Sophos.

    For the meantime I added

    C:\Program Files (x86)\Microsoft Office\root\Office16\OUTLOOK.EXE

    and

    C:\WINDOWS\System32\ucrtbase.dll

    to the Global Exclusion list within Sophos Central, hopefully to prevent our users from getting annoyed by sudden crashes of Outlook.

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