You receive error code 0x80071a90 during Standalone or Configuration Manager Integration setup of MBAM 2.0

Article ID: 2876732 - View products that this article applies to.
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When you try to install Microsoft BitLocker Administration and Monitoring (MBAM) 2.0 as a Standalone or Configuration Manager Integration, the setup may fail. Additionally, you may receive error code 0x80071a90 in the MBAM 2.0 setup log.

The MBAM 2.0 Setup log may contain the following information:

Action 14:22:34: WriteIIS7ConfigChanges. Installing Config Keys and Values
MSI (s) (0C:8C) [14:22:34:947]: Executing op: CustomActionSchedule(Action=WriteIIS7ConfigChanges,ActionType=11265,Source=BinaryData,Target=**********,CustomActionData=**********)
MSI (s) (0C:B4) [14:22:34:948]: Invoking remote custom action. DLL: C:\Windows\Installer\MSIC291.tmp, Entrypoint: WriteIIS7ConfigChanges
WriteIIS7ConfigChanges:  Entering WriteIIS7ConfigChanges in C:\Windows\Installer\MSIC291.tmp, version 3.7.1224.0
WriteIIS7ConfigChanges:  Custom action data hash: 41034C345A4E6B9B4DDB8490C1BC5266637BC0E8
WriteIIS7ConfigChanges:  CustomActionData WriteIIS7ConfigChanges length: 3693
WriteIIS7ConfigChanges: Error 0x80071a90: Failed to Commit IIS Config Changes
WriteIIS7ConfigChanges: Error 0x80071a90: WriteIIS7ConfigChanges Failed.
CustomAction WriteIIS7ConfigChanges returned actual error code 1603 (note this may not be 100% accurate if translation happened inside sandbox).


During the MBAM 2.0 installation the setup writes files to the C:\Windows folder. You may get the above error if an Anti Virus Online Scanner software interferes and locks the C:\Windows folder when MBAM 2.0 is trying to write files to the folder and making changes to IIS Configuration.


To resolve this problem, ensure to exclude the following folder from Anti-Virus Online Scanning before executing MBAM 2.0 setup:

  • C:\Windows\
  • C:\Inetpub\

  • You can temporarily disable Anti-Virus Online Scanning and re-enable after MBAM 2.0 installation is completed.

More information

Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.


Article ID: 2876732 - Last Review: August 2, 2013 - Revision: 1.0
Applies to
  • Microsoft BitLocker Administration and Monitoring 2.0
kbtshoot KB2876732

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