Windows update error code 80071A91 and 80070643

My OS was originally Vista and was upgraded to Windows 7 Home Premium.  It used to update successfully even after the upgrade. However, it suddenly failed to do it with error codes 80071A91 and 80070643

KB2079403: Security Update for Windows 7

KB2160329: Security Update for Windows 7

KB2183461: Cumulative Security Update for Internet Explorer 8

KB2272691: Update for Windows 7

KB2286198: Security Update for Windows 7

KB978886: Security Update for Windows 7

KB979482: Security Update for Windows 7

KB979916: .NET Framework 3.5 SP1 Security Update for Windows 7 x86

KB980195: Cumulative Update of ActiveX Killbits for Windows 7

KB980218: Security Update for Windows 7

KB980436: Security Update for Windows 7

KB980846: Security Update for Windows 7

KB980178: Cumulative Update for Media Centre

KB981793: Update for Windows 7

KB981852: Security Update for Windows 7

KB 982110: Update for Windows 7

KB982214: Security Update for Windows 7

KB982526: .NET Framework 3.5 SP1 Update for Windows x86

KB982664: Update for Internet Explorer 8 Compatibility View List for Windows 7

KB982665: Security Update for Windows 7

KB982670: Microsoft .NET Framework 4 Client Profile Update for Windows 7 x86

KB982799: Security Update for Windows 7

KB983590: .NET Framework 3.5.1 Security Update for Windows 7 x86

KB976422: Update for Windows 7


I am using ESET NOD32 Antivirus 4 and I have also used the Microsoft Malicious Software Removal Tool  to scan my computer, both of which showed no infection.

Grateful if anyone can help


Question Info

Last updated December 12, 2018 Views 7,477 Applies to:



The error code 0x80071A91 translates to ‘Transaction support within the specified file system resource manager is not started or was shut down due to an error’ and for error code 0X80070643, I would suggest you to take a look at the article mentioned below.

How to get support for Windows Update problems


I would suggest you to disable the Security software and check whether you are able to install Windows Updates.

Note: Once done with Installing Windows Updates, I would suggest you to turn one the security software on the system.


Step 1:
Check whether the Windows Update andBackground Intelligent Transfer Services set to Automatic.

a.       Click on Start menu and type in Services.msc in the start search box and press Enter.

b.      Locate the above mentioned two services and right click on it.

c.       Click on Properties and in General tab, make sure that Startup type is set to Automatic.


Step 2:

I would suggest you to do a clean boot and check whether you are able to install the Updates on the system. To perform a clean boot follow steps mentioned in the link given below.

How to troubleshoot a problem by performing a clean boot in Windows Vista or in Windows 7

Note: After you have finished installing, follow step 7 to boot the computer in normal startup.


Step 3:

Reset windows Update components and check. Follow the steps mentioned in the article given below.

How do I reset Windows Update components?


Step 4:

I would suggest you to run check sur. Check the article mentioned below.

Description of the System Update Readiness Tool for Windows Vista, for Windows Server 2008, for Windows 7, and for Windows Server 2008 R2


Step 5:

I would suggest you to manually download the update from the Microsoft website and then install them one at a time on the system and check. To download the updates manually search for each update code which starts with the letters "KB" and followed by a set of numbers (i.e, KB979309).Click the link for the download and then clickDownloadand Run.  You'll need to accept the agreement and then click Continue.
Microsoft's Download Center:
Repeat this process for each download that Windows Updates was unable to install.

Thank you and Regards.           

Thahaseena M
Microsoft Answers Support Engineer.
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