A memory leak occurs when the InnerHTML property of an element is updated repeatedly in Internet Explorer 8

You develop a web page in which you set the InnerHTML property of an element to be updated repeatedly. When you browse the web page by using Internet Explorer 8 and you keep the web page open for some time without performing any actions, you will see a memory leak issue inside Internet Explorer.

If you use Performance Monitor (Perfmon.exe) to monitor Internet Explorer processes, you notice that the value of the Private Bytes counter continually increases. This is evidence of a memory leak issue.

Note The value of leaked private bytes reduces when you manually refresh the Web page.

Hotfix information

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 this specific problem.

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, submit a request to 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, visit the following Microsoft Web site: 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.

Prerequisites

To apply this hotfix, you must have Internet Explorer 8 installed on one of the following Windows operating systems:

• Windows Server 2003 Service Pack 2 (SP2)
• Windows Vista Service Pack 1 (SP1)
• Windows Server 2008

Registry information

Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base: After you install this hotfix on the computer, you must add a registry value to enable the hotfix. To do this, follow these steps:

1. Click Start
   , click Run, type Regedit, and then press ENTER.
2. Locate and then click the following registry subkey:
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl
3. On the Edit menu, point to New, and then click Key.
4. Type FEATURE_SCRIPT_CONTEXT_REUSE_KB975623, and then press ENTER.
5. On the Edit menu, point to New, and then click DWORD Value.
6. Type *, and then press ENTER.
7. Right-click *, and then click Modify.
8. In the Value data box, type 1, and then click OK.
9. Exit Registry Editor.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace a previously released hotfix.

Security update information

To resolve this issue, install the most recent cumulative security update for Internet Explorer. To do this, visit the following Microsoft website: For more technical information about the most recent cumulative security update for Internet Explorer, visit the following Microsoft website: Note This hotfix was first included in security update : 980182 MS10-018: Cumulative security update for Internet Explorer.

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.

For Internet Explorer 8 on all supported x86-based versions of Windows Server 2003 SP2

For Internet Explorer 8 on all supported x64-based versions of Windows Server 2003 SP2

Windows Vista and Windows Server 2008 file information notes

Important Windows Vista hotfixes and Windows Server 2008 hotfixes are included in the same packages. However, only "Windows Vista" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both of these operating systems, select the hotfix that is listed under "Windows Vista" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

• The files that apply to a specific product, SR_Level (RTM, SPn), and service branch (LDR, GDR) can be identified by examining the file version numbers as shown in the following table.

  Version	Product	SR_Level	Service branch
  6.0.600 1.22xxx	Windows Vista and Windows Server 2008	SP1	LDR

• Service Pack 1 is integrated into the release version of Windows Server 2008. Therefore, RTM milestone files apply only to Windows Vista. RTM milestone files have a 6.0.0000.xxxxxx version number.
• The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately in the "Additional file information for Windows Server 2008 and for Windows Vista" section. MUM files and MANIFEST files, and the associated security catalog (.cat) files, are extremely important to maintaining the state of the updated component. The security catalog files, for which the attributes are not listed, are signed with a Microsoft digital signature.

For Internet Explorer 8 on all supported x86-based versions of Windows Server 2008 and of Windows Vista SP1

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base: For more information about the InnerHTML property, visit the following Microsoft Web site:For more information about Performance Monitor, visit the following Microsoft Web site:

Additional file information

Additional file information for Windows Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008