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Howdy again,

I encountered a problem during the installation of the prerequisites of SharePoint 2010 Enterprise. The installation of KB976462 failed, and so would eventually the whole prerequisites installer. The error message pointed me to the log file.

Here is an excerpt from the installation log:

2012-01-11 16:07:21 – Beginning download of Hotfix for Microsoft Windows (KB976462)
2012-01-11 16:07:21 –
2012-01-11 16:07:23 – Size of download of "Hotfix for Microsoft Windows (KB976462)" in bytes is "4331740"
2012-01-11 16:07:23 – Download of "Hotfix for Microsoft Windows (KB976462)" completed successfully
2012-01-11 16:07:23 – Installing Hotfix for Microsoft Windows (KB976462)
2012-01-11 16:07:23 – "C:\Windows\system32\wusa.exe" "C:\Users\xxx~1\AppData\Local\Temp\KB926A2.tmp.msu" /quiet /norestart
2012-01-11 16:07:26 – Install process returned (-2145124329)
2012-01-11 16:07:26 – [In HRESULT format] (-2145124329)
2012-01-11 16:07:26 – Last return code (-2145124329)
2012-01-11 16:07:26 – Error: The tool was unable to install Hotfix for Microsoft Windows (KB976462).
2012-01-11 16:07:26 – Last return code (-2145124329)
2012-01-11 16:07:26 – Options for further diagnostics: 1. Look up the return code value 2. Download the prerequisite manually and verify size downloaded by the prerequisite installer. 3. Install the prerequisite manually from the given location without any command line options.
2012-01-11 16:07:26 – Cannot retry

So, the solution is quite simple: You must download, extract and install the hotfix manually. The following 3 steps show how it works:

1. Download the KB976462 manually from here:



Choose the “x64” version of the msu file. Save it to a local directory: I used here C:\Installation\KB976462.

2. Open a command prompt and expand the msu file (make sure you open cmd with administrator rights)

expand -f:* "C:\Installation\KB976462\Windows6.1-KB976462-v2-x64.msu" %TEMP%

3. install using:

pkgmgr /n:%TEMP%\Windows6.1-KB976462-v2-x64.xml


All done! Re-run the prerequisites installer – it should finish with success, as expected.


Hope this was of some help!

Thanks and best regards,


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