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
    2021-01-21T21:08:36+00:00

    Today I added "Microsoft Outlook" as an exclusion to the Protected Applications list for Exploit Mitigation within Sophos Central.

    https://docs.sophos.com/central/Customer/help/en-us/central/Customer/common/tasks/ExploitExclusions.html

    So far so good.... 🤞

    Won't this disable Exploit Mitigation globally for your Sophos installs?  Sophos doesn't recommend disabling it when we looked on our side.

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  2. Anonymous
    2021-01-21T16:50:41+00:00

    Tomorrow I would love to know if this continued to help.   If you hear anything from Sophos in addition please let me know.

    Today I added "Microsoft Outlook" as an exclusion to the Protected Applications list for Exploit Mitigation within Sophos Central.

    https://docs.sophos.com/central/Customer/help/en-us/central/Customer/common/tasks/ExploitExclusions.html

    So far so good.... 🤞

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  3. Anonymous
    2021-01-21T15:44:15+00:00

    Today I added "Microsoft Outlook" as an exclusion to the Protected Applications list for Exploit Mitigation within Sophos Central.

    https://docs.sophos.com/central/Customer/help/en-us/central/Customer/common/tasks/ExploitExclusions.html

    So far so good.... 🤞

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  4. Anonymous
    2021-01-21T13:51:12+00:00

    Unfortunately, for me the Sophos hotfix did not prevent Outlook from crashing either.

    However, disabling the Exploit mitigation component did.

    I will provide Sophos my feedback.

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  5. Anonymous
    2021-01-21T08:48:04+00:00

    Ai, that's a pity. I will try the hotfix myself too.

    Sophos did not provide me any information, besides at first to find out which Sophos component causes the issue (if Sophos is the cause) and they provided me the link to the hotfix I mentioned.

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