Unexpected behaviors and failures in Internet Explorer with McAfee Host Intrusion Prevention installed

Hi everyone!

IE Support is seeing a huge influx of issues with weird IE behaviors and failures coming in over the last two days.  We are seeing IE crashes, IE simply unloading from memory, and even script errors on web application that have been working in the past without issue.  Currently, we are only seeing these errors with Internet Explorer 7 and 8.

The issue appears to be related to a recent signature update to McAfee’s Host Intrusion Prevention software that was released on July 14, 2009.

If you are seeing these kinds of behaviors with Internet Explorer since in or around the July 14th, 2009, we recommend that you review the details outlined in this McAfee KB article:

https://kc.mcafee.com/corporate/index?page=content&id=KB66316

Our understanding is that a signature update has already been released to resolve this issue.  However, if you need further assistance from McAfee technical support in getting the signature update, you can contact them using the information located here:

https://www.mcafee.com/us/about/contact/index.html

More information:   You can continue to browse in a limited capacity by starting Internet Explorer in No Add Ons mode by using the shortcut located under All Programs | Accessories | System Tools until you update the affected signature file:

There is also a command line option you can use as well.  From a command line window you can using the below option:

Once you hit enter, IE will load with no Add Ons within the IE process:

Regards,

The IE Support Team