CPU usage reaches almost 100 percent when you reply to or forward an e-mail message in Outlook 2003 on a computer that has Internet Explorer 7 or Internet Explorer 8 installed

On a computer that is running Microsoft Office Outlook 2003, you have Windows Internet Explorer 7 or�Windows Internet Explorer�8�installed. When you try to forward or reply an e-mail message in Outlook 2003, you find that the CPU usage reaches almost 100 percent in the Performance tab of Windows Task Manager. Additionally, the e-mail message is open, the scrollbar shows wrong size, and the pointer is blinking in an unusual way.

This problem occurs because of the way that Outlook 2003 hooks Mshtml.dll to have an Insert control in the HTML view. This problem occurs when the computer has Internet Explorer 7 or Internet Explorer 8 installed.�

Security update information

To resolve this problem, install the most recent cumulative security update for Windows Internet Explorer. To do this, visit the following Microsoft website: For more technical information about the most recent cumulative security update for Windows Internet Explorer, visit the following Microsoft website: Note This update was first included in security update 2360131 (MS10-071). For more information, click the following article number to view the article in the Microsoft Knowledge Base: