Windows Process Activation Service stops running unexpectedly in Windows Server 2008

Applies to: Windows Server 2008 EnterpriseWindows Server 2008 Standard


Consider the following scenario:
  • You have a server that is running Windows Server 2008.
  • You have Internet Information Services (IIS) 7.0 installed on the server.
In this scenario, the Svchost.exe process of Windows Process Activation Service (WAS) stops running unexpectedly.

Because the World Wide Web Publishing Service (W3SVC) depends on WAS, these services and your web application stop. Additionally, the following events are logged in the Application and System event logs:

Log Name: Application
Source: Application Error

Event ID: 1000
Level: Error
Faulting application name: svchost.exe_WAS, version: 6.0.6001.18000, time stamp: 0x47919291
Faulting module name: nativerd.dll, version: 7.0.6002.18139, time stamp: 0x4af812b4
Exception code: 0xc0000005
Fault offset: 0x000000000000e49f
Faulting process id: 0xf08
Faulting application start time: 0x01cebeec8563f730
Faulting application path: %11
Faulting module path: %12
Report Id: %13Log Name: System
Source: Service Control Manager

Event ID: 7034
Level: Error
The World Wide Web Publishing Service service terminated unexpectedly. It has done this 1 time(s).
Note This problem does not occur on a server that is running Windows Server 2008 R2 and has IIS 7.5 installed.


When this problem occurs, the Windows Process Activation Service refers to the null pointer during configuration changes. This causes the Svchost.exe process to crash and the websites to restart.


Hotfix information

A supported hotfix is available from Microsoft Support. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing the problem described in this article. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, go to the following Microsoft website:Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


To apply this hotfix, you must have Service Pack 2 for Windows Server 2008 installed.

Restart requirement

You have to restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any previously released hotfix.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


Learn about the terminology Microsoft uses to describe software updates.