In Windows Vista, click Security in Control Panel, and then click Windows Update.

In Windows 7, click Start, click Control Panel, and then click Windows Update.To check whether these things are causing the problem, do one of the following steps: The installation of other updates is in progress.Internet Explorer 9 might not automatically install prerequisite software and components if one of the following conditions is true: Things to consider before you go the manual install route Make sure that no updates are being installed and that no restart is pending In that case, you must manually install the prerequisite software and components that are described later in this article. If some of these prerequisites can't be installed automatically, the Internet Explorer 9 installation process won't finish.

Their details vary, depending on the operating system that your computer is running. They are Internet Explorer 9 prerequisites. When you install Internet Explorer 9, additional software and components are also installed as part of the process. Original product version: Internet Explorer 9 Original KB number: 2399238

This article helps you resolve the problem that some prerequisites of Internet Explorer 9 can't be installed automatically. For more information, see Internet Explorer 11 desktop app retirement FAQ. The retired, out-of-support Internet Explorer 11 desktop application has been permanently disabled through a Microsoft Edge update on certain versions of Windows 10.

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