Windows 7 SP1 Gives ERROR_TRANSACTIONAL_CONFLICT(0x80071a90)

I have tried installing Windows 7 SP1 via Windows Update, the recommended option by Microsoft.  It says updates installed successfully, but after reboot I get a not successfull dialog box and Error: ERROR_TRANSACTIONAL_CONFLICT(0x80071a90).

I followed the link to go online to learn more, followed and ran the troubleshooter in Control Panel.

Tried installing SP1 again using Windows Update.  Again successful, but after reboot again same error message.

I have no anti-virus software.  This is the first time I am getting this error message.



Hello K.Kong,

Thank you for your post.

Please try the steps below in order:

1.  Depending on your Windows 7 architecture, download / install and run the System Update Readiness Tool  - CheckSur  You can download the tool from the links below in accordance with your system type.

Download the System Update Readiness Tool (64bit)

Download the System Update Readiness Tool (32bit)

2.  Click  Start type cmd (you should see the command prompt populate at the top) Right-click it and select  Run as Administrator

Inside the prompt type sfc /scannow

*For more information regarding the System File Checker.

*If corruption is found, see How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7.

3.  Once the SFC is complete, Check your hard drive for errors.

4.  Run the System Update Readiness Tool again.  If the errors have been cleared, try installing Service Pack 1 again.  If not, move to step 5.

5.  Perform a Startup Repair, upon startup, try installing the Service Pack.

Please let us know the details of each scan or utility.  We look forward to hearing back from you.


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Question Info

Last updated October 16, 2020 Views 26,324 Applies to: