An instance of the JScript scripting engine leaks memory when Internet Explorer 8 or Internet Explorer 9 is installed on a computer that is running Windows 7 or Windows Server 2008 R2

Windows 7 or Windows Server 2008 R2 together with Internet Explorer 8

To resolve this problem for Windows 7 or Windows Server 2008 R2 on a system that has Internet Explorer 8 installed, apply this hotfix. This problem is also resolved by the JScript.dll file that is installed by security update 2706045.

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, go to the following Microsoft website: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Additionally, you can install this update from the Microsoft Download Center. The following updates are available for download from the Microsoft Download Center:

Update for Windows 7 (KB2707082)

Update for Windows 7 for x64-based systems (KB2707082)

Update for Windows Server 2008 R2 x64-based systems (KB2707082)

Update for Windows Server 2008 R2 for Itanium-based systems (KB2707082)

File information

The English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows 7 and Windows Server 2008 R2 file information notes

• The MANIFEST files (.manifest) that are installed for each environment are listed separately in the "Additional file information for Windows 7 and for Windows Server 2008 R2" section. MANIFEST files, and the associated security catalog (.cat) files, are very important for maintaining the state of the updated components. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For all supported x86-based versions of Windows 7

For all supported x64-based versions of Windows 7 and of Windows Server 2008 R2

For all supported IA-64-based versions of Windows Server 2008 R2

For more information about the IActiveScriptSite interface and the IActiveScript interface, go to the following Microsoft Developer Network (MSDN) websites:For more information about how to set the SCRIPTPROP_HOSTKEEPALIVE property, go to the following MSDN website:For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base: