When you perform some operations in a lab center environment in Microsoft Test Manager 2010, the lab center environment freezes. Additionally, the following error message is logged in the application event log on the Microsoft Visual Studio Team Foundation Server 2010 Application-Tier server every few seconds:

Source: TFS Services
Date: <date time>
Event ID: 3000
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: <computer name>
TF53010: The following error has occurred in a Team Foundation component or extension:
Date (UTC): <date time>
Machine: <machine name>
Application Domain: TfsJobAgent.exe
Assembly: Microsoft.TeamFoundation.Framework.Server, Version=, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a; v2.0.50727
Service Host:
Process Details:
Process Name: TFSJobAgent
Process Id: <process id>
Thread Id: <thread id>
Account name: <account name>
Detailed Message: "LabService error has occurred"
Exception Message: The type initializer for 'Microsoft.TeamFoundation.Lab.Common.ExtendedStopwatch' threw an exception. (type TeamFoundationServiceException)
Exception Stack Trace:
Inner Exception Details:
Exception Message: Arithmetic operation resulted in an overflow. (type OverflowException)
Exception Stack Trace: at Microsoft.TeamFoundation.Lab.Common.ExtendedStopwatch.NativeMethods.GetMaxCpuFrequency()
at Microsoft.TeamFoundation.Lab.Common.ExtendedStopwatch..cctor()


Hotfix information

A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Customer Support Services to obtain the hotfix. For a complete list of Microsoft Customer Support Services telephone numbers and information about support costs, visit the following Microsoft website: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.


To apply this hotfix, you must have Microsoft Team Foundation Server 2010 Service Pack 1 (SP1) installed.

Restart requirement

You do not have to restart the computer after you install the hotfix if the affected files are not being used at the time of installation. We recommend that you close all Visual Studio 2010-related components before you install the hotfix.

The global version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

File name

File version

File size











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

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