FIX: An App-V 4.5 SP2 server cannot recover when an application virtualization database fails over

Applies to: Microsoft Application Virtualization 4.5 for Terminal ServicesApplication Virtualization 4.5 for Windows Desktops


An application virtualization database in Microsoft Application Virtualization (App-V) 4.5 Service Pack 2 (SP2) is hosted on an instance of a Microsoft SQL Server failover cluster. When the database fails over, the App-V server cannot recover, and the App-V users receive the following error message:

The Application Virtualization Server has returned an Internal System error. Report the following error code to your System Administrator:

In this situation, clients cannot update publishing information, and application starts fail. Additionally, Event ID 41543 is logged in the Application log on the App-V server.


Hotfix information

A supported hotfix is available from Microsoft. 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 (App-V 4.5 SP2 HF03), you must have Service Pack 2 for Microsoft Application Virtualization 4.5 installed.

Restart information

You must restart the computer after you apply this hotfix.

Replacement information

This hotfix does not replace any previously released hotfix.


To work around this problem, restart the Application Virtualization Management Server service. To do this, follow these steps:
  1. In Administrative Tools, open the Services MMC snap-in.
  2. Locate the Application Virtualization Management Server service.
  3. Right-click Application Virtualization Management Server, and then click Restart.


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


See the terminology Microsoft uses to describe software updates.