As indicated in
|"This problem occurs when one or more of the following conditions are true: |
• The Web page contains many frames.
• You browse many frames in a short time.
Internet Explorer 7 evaluates the whole Web page when you browse a frame. Therefore, CPU usage may be very high."
There is an update that Microsoft has released for this issue. However, because this is not a security issue, it must be manually downloaded. It is available from