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
    2021-01-15T16:56:22+00:00

    Sophos here as well.

    Will run some tests here on Monday.

    Thanks for updates all.

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  2. 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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  3. Anonymous
    2021-01-15T16:19:49+00:00

    Currently I started a testscenario with a user who experienced a crash of Outlook today about 8 times by turning-off Sophos completely for the 4 coming hours. Hopefully in that period no new crashes of Outlook occur.

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  4. Anonymous
    2021-01-15T15:46:58+00:00

    We are also running Sophos Endpoint Protection in our environment. We may be on to something here.

    However, all of my users are running it, but not all of the users are experiencing the issue, which is why I kind of wrote the AV off throughout the troubleshooting process. Additionally, the problem ebbs and flows with no real consistency.

    On a side note, I appreciate everyone commenting and giving this issue some traction. With more eyes on it, I'm confident we can figure this thing out.

    Thank you.

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  5. Anonymous
    2021-01-15T14:50:07+00:00

    Just for more data points.  Our clients are also running Sophos on a VDI environment through VMWare.  The issue has slowed down a lot since a couple of weeks ago but still pops up time to time.

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