Outlook addin hanging with Avast 4.8

[Lisandro]

I will see if I can fix it with what I have learned in here

Please, post back the results and if you need further help.

[P3iSystems]

I believe that this may also be affecting one of our clients. It is has occurred on many other machines running Outlook 2003 & 2007 and disabling the avast outlook add-in prevents further hangs. I'm going to try disabling the Internet Mail module to see if this allows the outlook add-in to function without outlook crashing. Another thing that I noticed after researching the event logs on one of the affected user's machine is that there is a particular .NET error that occurs and then shortly after Outlook crashes. The .NET error is

Event Type:   Error
Event Source:   .NET Runtime
Event Category:   None
Event ID:   1023
Date:      10/22/2010
Time:      1:32:03 PM
User:      N/A
Computer:   DBFW5BF1
Description:
.NET Runtime version 2.0.50727.3615 - Fatal Execution Engine Error (7A0979AE) (80131506)

I'll post back here with the results. Thanks to everyone who submitted their input into this thread. If the info in this thread provides a solution, we will be grateful as will our client.