Unable to install updates, getting error code 80071A91

This has been driving me nuts for over a month.
Updates that don't instal after downloading.

I get the same error code for each one: error code 80071A91

The updates are:
Internet Explorer 8 Release Candidate 1 for Windows Vista

Cumulative Security Update for Internet Explorer 8 Beta 2 for Windows Vista (KB961260)

Cumulative Update for Media Center for Windows Vista (KB960544)

I have enetred the error code on the microsoft website and it says:

No Results Found For: error code 80071A91


Hello tgregg3 and welcome to the Microsoft Answers Forum.



Windows Update Error 0x80071A91


The error code 0x80071A91 translates to " Transaction support within the specified file system resource manager is not started or was shutdown due to an error.” Now I know that doesn’t mean much to the common user, but it gives us some insight as to the failure you’re experiencing.


In an effort to resolve this issue I recommend you run the following command. This will in essence reset the File System Resource Manager (FSRM), and should resolve the issue with the failed updates.


If this does not resolve you present update error please let us know. Also, keep in mind that if one update in a group fails all the updates will fail with one error code. Thus, it may be to your benefit to attempt installing those updates one at a time to see if the problem is restricted to a particular update.


How-to reset the File System Resource Manager if you receive error 0x80071A91


1.     Click Start, click All Programs, click Accessories, right-click Command Prompt, and select Run as administrator.

2.     In the Command Prompt window you will need to type the following, and press ENTER:

fsutil resource setautoreset true C:\

3.     Note: You will need to replace the C:\ with the drive letter that Windows Vista is installed on.

4.     Restart your computer, and then attempt to install the failed update(s).



Posting to you from Windows 7!
Posting to you from Windows 7!

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Question Info

Last updated June 1, 2021 Views 97,886 Applies to: