Microsoft has confirmed an issue with the deployment of Windows 7 Service Pack 1 RTM in which, following the installation process, some customers can experience a Blue Screen of Death crash accompanied by "Error C000009A."
According to the Redmond company, at fault are language packs that the users have already integrated with the operating system prior to starting to install SP1.
Customers do have a solution, but it requires quite a lot of time and effort on their part, as they will need to perform all steps manually.
“After installing Windows 7 Service Pack 1 (SP1), you might receive the following error message on a blue screen: "Error C000009A applying update operation {###} of {###} (\Registry...)," the company revealed.
The software giant explains that the best way to tackle this problem is to remove the source.
“To resolve this issue, restore your computer to a point in time before you installed Windows 7 SP1, uninstall any unused language packs, and then reinstall SP1. To restore your computer to a previous point in time, you'll need to use the System Recovery Options menu,” the company revealed.
At the time of this article Microsoft was yet to produce an automated fix for the issue described in this article, or to reveal any additional workarounds on top of the solution presented above.
Truth be told, the software giant has always advised customers not to install any language packs unless they absolutely need them.
The company even made a point about emphasizing that adding all the language packs available to a copy of Windows 7 can have an impact on the overall performance of the platform.
And it appears that unused language packs can also have additional unwanted consequences.
“After you reinstall SP1, if you still see the error message, follow the steps again to restore your computer to a previous point in time, and then uninstall more language packs,” Microsoft stated.
Windows 7 Service Pack 1 (SP1) RTM Build 7601.17514.101119-1850 and Windows Server 2008 R2 Service Pack 1 (SP1) RTM are available for download here.
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