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SAPLOGON.EXE crashes after Update KB5055523

Anonymous
2025-04-14T13:17:27+00:00

Hi everyone,

we have big issues in our company after installing Update KB5055523 on Windows 11 PC's.

On every PC the SAPLOGON.exe crashes at start. In the Eventviewer ist this entry:

Fehlerhafter Anwendungsname: saplogon.exe, Version: 8000.1.12.1161, Zeitstempel: 0x67e601f5

Fehlerhafter Modulname: ntdll.dll, Version: 10.0.26100.3775, Zeitstempel: 0xe141486e

Ausnahmecode: 0xc0000409

Fehleroffset: 0x000b1c30

Fehlerhafte Prozess-ID: 0x2EDC

Fehlerhafte Anwendungsstartzeit: 0x1DBAD08F81A279D

Fehlerhafter Anwendungspfad: C:\Program Files (x86)\SAP\FrontEnd\SAPGUI\saplogon.exe

Fehlerhafter Modulpfad: C:\WINDOWS\SYSTEM32\ntdll.dll

Berichts-ID: f221fa86-e58f-4a7b-ba47-5696f529aac1

Vollständiger Name des fehlerhaften Pakets: 

Fehlerhafte paketbezogene Anwendungs-ID: 

To fix it i tried :

  1. Admin CMD --> SFC
  2. Admin CMD --> DISM
  3. Installing latest SP for SAPGUI
  4. Re-Installing SAPGUI completly

Nothing from Above worked...

My last shot was uninstalling the latest Update which my PC gets on April 11th (KB5055523) and voilà, SAPLOGON worked like before.

Please let me know if there is any solution to fix this issue without uninstalling the Update.

Best Regards

Windows for home | Windows 11 | Windows update

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  1. Anonymous
    2025-04-15T13:19:55+00:00

    Hi,

    I assume that you use Crowdstrike, this issue occurred in our case with SAP, KB5055523 and Crowdstrike Falcon in combination.
    https://supportportal.crowdstrike.com/s/article/Some-applications-may-crash-after-installing-Windows-KB5055523-when-AUMD-is-enabledAfter setting up an exclusion of the saplogon path and of the  ntdll.dll path, in the Crowdstike Portal, **** SAP starts without an issue.

    Best Regards

    10 people found this answer helpful.
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  1. Anonymous
    2025-04-16T06:06:02+00:00

    Moin Chris,

    jepp we also use Crowdstrike Falcon and that's exactly the problem as you describe.

    Thank you very much!

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  2. Anonymous
    2025-04-15T07:25:58+00:00

    In our case the issue was related to installed security software, you might want to take a look and try removing such kind of products.

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  4. Siva Shankar 10,885 Reputation points
    2025-04-14T18:57:23+00:00

    Hello ,

    I’m here to help you in resolving your issue

    KB5055523 might have introduced a conflict with the version of SAPGUI or specific components related to it.

    Until next patch is released, please pause the updates.

    Navigate to Settings > Update & Security > Windows Update > Advanced options.

    Under Pause updates, select a date to delay future updates that might break compatibility.

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