HOWTO: Windows 7 SP1 Error during installation: “Service Pack Installation failed with error code 0x800f081f”

                When I attempt to install Windows 7 SP1 on multiple machines, I began the installation process as shown below. with the standalone and windows update version of the SP.


It soon returns with this error:


The troubleshooting page walks users through updating their anti-virus programs to update the mpfilter file.  This wasn’t my issue.

I didn’t have Microsoft Security Essentials installed and I searched the registry to verify that I’ve never had it installed.  I had the latest Forefront client installed.   

I’ve visited the path mentioned in the troubleshooting page and found that my version of mpfilter is above the minimum that the SP checks for.


In addition, the event log had a message indicating that the service pack installation failed.  This is happening on multliple machines for me.

“Service Pack Installation failed with error code 0x800f081f”

The problem turned out to be that the RSAT tools ( were an older version for Windows 7.  This was preventing the installation of the service pack.  I uninstalled the RSAT tool by going to Control Panel>Programs and Features>Installed Updates and uninstalled the updated relating to KB958830.

I was able to successfully install the service pack after this.

Comments (1)
  1. Rufus says:

    How about this error? Has anyone seen this with their windows 7 SP1 install?

    Log Name:      System

    Source:        Microsoft-Windows-WindowsUpdateClient

    Date:          2/25/2011 9:12:13 AM

    Event ID:      20

    Task Category: Windows Update Agent

    Level:         Error

    Keywords:      Failure,Installation

    User:          SYSTEM

    Computer:      xxxx


    Installation Failure: Windows failed to install the following update with error 0x80070643: Windows 7 Service Pack 1 for x64-based Systems (KB976932).

    Event Xml:

    <Event xmlns="…/event">


       <Provider Name="Microsoft-Windows-WindowsUpdateClient" Guid="{945A8954-C147-4ACD-923F-40C45405A658}" />







       <TimeCreated SystemTime="2011-02-25T14:12:13.106566500Z" />


       <Correlation />

       <Execution ProcessID="1012" ThreadID="3028" />



       <Security UserID="S-1-5-18" />



       <Data Name="errorCode">0x80070643</Data>

       <Data Name="updateTitle">Windows 7 Service Pack 1 for x64-based Systems (KB976932)</Data>

       <Data Name="updateGuid">{9CAA0B4A-025E-4531-B969-AA268F32D86F}</Data>

       <Data Name="updateRevisionNumber">101</Data>



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