A memory leak occurs when you open a Web page that contains a circular reference in an iframe

Security update information

To resolve this problem, install the most recent cumulative security update for Internet Explorer. To install the most recent updates, 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 update was first included in security update 2416400 (MS10-090).
For more information, click the following article number to view the article in the Microsoft Knowledge Base:

2416400 MS10-090: Cumulative security update for Internet Explorer

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:

322756 How to back up and restore the registry in Windows

After you install the update for Internet Explorer 6 and 7 on the computer, you must add a registry value to enable the fix. To do this, follow these steps:  

1. Click Start, click Run, type regedit, and then press ENTER.
2. Locate and then click the one of the following registry subkeys:
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl
   
   HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl
3. On the Edit menu, point to New, and then click Key.
4. Type FEATURE_ADDITIONAL_MEMORY_CLEANUP_KB975736, and then press ENTER.
5. Right-click FEATURE_ADDITIONAL_MEMORY_CLEANUP_KB975736, point to New, and then click DWORD Value.
6. Type Iexplore.exe, and then press ENTER.
7. Right-click Iexplore.exe, and then click Modify.
8. In the Value data box, type 1, and then click OK.
9. Exit Registry Editor.

Note Applications that host the WebBrowser control (WebOC) or MSHTML can opt into the fix by adding the above registry entry. Replace the DWORD value from "iexplore.exe" to the name of the application (<appname>.exe).

The problem does not occur in Internet Explorer 8 or in Internet Explorer 9, However, with either of the Internet Explorer versions installed, if you use applications that host the WebBrowser control(WebOC) or MSHTML browse to the page, then the problem still occurs. Such applications can opt into the fix by adding a registry entry. To do this, follow these steps:

1. Click Start, click Run, type regedit, and then press ENTER.
2. Locate and then click the one of the following registry subkeys: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\MAIN\FeatureControl
   
   HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl
3. On the Edit menu, point to New, and then click Key.
4. Type FEATURE_ADDITIONAL_IE8_MEMORY_CLEANUP, and then press ENTER.
5. Right-click FEATURE_ADDITIONAL_IE8_MEMORY_CLEANUP, point to New, and then click DWORD Value.
6. Type <appname>.exe, and then press ENTER.
7. Right-click <appname>.exe, and then click Modify.
8. In the Value data box, type 1, and then click OK.
9. Exit Registry Editor.