c000009a

About this tag
The c000009a tag on WindowsForum.com covers the 0xC000009A error, which is a stop error that can occur when installing Windows 7 SP1 or Windows Server 2008 R2 SP1. This error typically results in a black screen and system hang. The tagged content references a Microsoft Knowledge Base article (KB2534366) that provides a fix for this issue. Users encountering this error during service pack installation on Windows 7 or Server 2008 R2 systems may find relevant troubleshooting steps and solutions under this tag.

  1. "0xC000009A" error message when you try to install Windows 7 SP1 or Windows Server 2008 R2 SP1

    Fixes an issue in which a computer that is running Windows 7 or Windows Server 2008 R2 stops responding at a black screen. This issue occurs when you try to install Windows 7 SP1 or Windows Server 2008 R2 SP1. Additionally, you receive an "0xC000009A"... More...
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    • black screen c000009a error fix installation sp1 support update windows 7 windows server
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    • Forum: Knowledge Base (KB)