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

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

69 answers

Sort by: Oldest
Most helpful Newest Oldest
  1. 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.... 🤞

    Was this answer helpful?

    0 comments
  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.... 🤞

    Was this answer helpful?

    0 comments
  3. 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.

    Was this answer helpful?

    0 comments
  4. Anonymous
    2021-01-22T11:59:10+00:00

    So far so good... Still no new crashes of Outlook within our organization.

    Was this answer helpful?

    0 comments
  5. Anonymous
    2021-01-22T12:03:36+00:00

    The Exploit Mitigation component is still enabled, only Outlook is excepted for a temporary period untill Sophos fixes the cause.

    Was this answer helpful?

    0 comments