You install Service Pack 2 (SP2) for Microsoft Forefront Threat Management Gateway 2010.
You use Forefront Threat Management Gateway to publish a secure website by using Secure Sockets Layer (SSL).
In this scenario, the Forefront Threat Management Gateway Firewall service (Wspsrv.exe) may crash frequently. When this problem occurs, you may find that the following event is logged in the Application log:
Source: Microsoft Forefront TMG Firewall
Event ID: 14057
Description: The Firewall service stopped because an application filter module C:\Program Files\Microsoft Forefront Threat Management Gateway\w3filter.dll generated an exception code C0000005 in address 000000007043254F when function CompleteAsyncIO was called. To resolve this error, remove recently installed application filters and restart the service.
This issue occurs because of a known problem that was introduced by Service Pack 2 for Forefront Threat Management Gateway 2010.
To resolve this issue, install the hotfix package that is described in the following Microsoft Knowledge Base article:
2649961 Rollup 1 for Forefront Threat Management Gateway (TMG) 2010 Service Pack 2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates