COMPUTER WORLD

You want to get rid of spam traps? Caught a piece of malware disguised as a false security alert from Microsoft: Update for Microsoft Outlook / Outlook Express (KB910721)? Check out Microsoft's response to this. They have createad and released an important update for Microsoft Outlook / Outlook Express.
If you get this message,
"Error message when you try to open e-mail messages that you downloaded by using the Pine e-mail client in Exchange Server 2003: "Not a string ()"
There's a hotfix download at http://support.microsoft.com/default.aspx/kb/910721

If you're still having trouble, try this step-by-step guide by sophos

Update for Microsoft Outlook / Outlook Express (KB910721)

Brief Description
Microsoft has released an update for Microsoft Outlook / Outlook Express. This update is critical and provides you with the latest version of the Microsoft Outlook / Outlook Express and offers the highest levels of stability and security.

Instructions

* Install Update for Microsoft Outlook / Outlook Express (KB910721). To do this, follow these steps:
1. Run attached file officexp-KB910721-FullFile-ENU.exe
2. Restart Microsoft Outlook / Outlook Express

Quick Details

* File Name: officexp-KB910721-FullFile-ENU.exe
* Version: 1.4
* Date Published: Wed, 17 Jun 2009 17:03:27 +0300
* Language: English
* File Size: 81 KB

System Requirements

* Supported Operating Systems: Windows 2000; Windows 98; Windows ME; Windows NT; Windows Server 2003; Windows XP; Windows Vista

* This update applies to the following product: Microsoft Outlook / Outlook Express

Download hotfix here
Exchange 2003 All (Global) i386 sp3 Fix258228