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This article helps fix an error (MMC has detected an error in a snap-in and will unload it) that occurs when you try to launch the Volume Activation Management Tool (VAMT) 3.0 on a Windows 7 or Windows Server 2008 R2-based computer.
Applies to: Windows 7 Service Pack 1, Windows Server 2012 R2
Original KB number: 2817142
Symptoms
On a computer that is running Windows 7 or Windows Server 2008 R2, when you try to launch the VAMT 3.0, it may fail. Additionally you may receive the following error message:
MMC has detected an error in a snap-in and will unload it
You are then prompted with two options:
- Report this error to Microsoft, and then shut down MMC.
- Unload the snap-in and continue running.
If the second option is selected, you may get an error message that is similar to the following:
Unhandled Exception in Managed Code Snap-in
FX:{6FBE5D92-C65A-41DC-AEBF-09D8845F68A1}
Exception has been thrown by the target of an invocationException type:
System.Reflection.TargetInvocationException
Exception stack trace:
at System.RuntimeTypeHandle.CreateInstance(RuntimeType type, Boolean publicOnly, Boolean noCheck, Boolean& canBeCached, RuntimeMethodHandle& ctor, Boolean& bNeedSecurityCheck)
at System.RuntimeType.CreateInstanceSlow(Boolean publicOnly, Boolean fillCache)
at System.RuntimeType.CreateInstanceImpl(Boolean publicOnly, Boolean skipVisibilityChecks, Boolean fillCache)
at System.Activator.CreateInstance(Type type, Boolean nonPublic)
at System.RuntimeType.CreateInstanceImpl(BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(Type type, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes)
at System.Activator.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityInfo, StackCrawlMark& stackMark)
at System.Activator.CreateInstance(String assemblyName, String typeName)
at System.AppDomain.CreateInstance(String assemblyName, String typeName)
at System.AppDomain.CreateInstanceAndUnwrap(String assemblyName, String typeName)
at Microsoft.ManagementConsole.Internal.SnapInClient.CreateSnapIn(String assemblyName, String typeName)
at Microsoft.ManagementConsole.Internal.ClassLibraryServices.Microsoft.ManagementConsole.Internal.IClassLibraryServices.CreateSnapIn(String assemblyName, String typeName)
at Microsoft.ManagementConsole.Internal.IClassLibraryServices.CreateSnapIn(String assemblyName, String typeName)
at Microsoft.ManagementConsole.Executive.SnapInApplication.CreateSnapIn(String snapInAqn)
at Microsoft.ManagementConsole.Executive.SnapInInitializationOperation.CreateSnapIn()
at Microsoft.ManagementConsole.Executive.Operation.OnThreadTransfer(SimpleOperationCallback callback)
Cause
This problem may occur if you do not have the .NET Framework 3.5.1 feature installed in Windows 7 or Windows Server 2008 R2.
Resolution
To resolve this problem, you need to install .NET Framework 3.5.1 using the following steps:
On a Windows 7-based computer
- Click the Start button and then click Control Panel.
- Select Programs.
- Under Programs and Features, select Turn Windows features on or off.
- Select the check box next to the Microsoft .NET Framework 3.5.1.
- Click on OK.
On a Windows Server 2008 R2-based computer
- Open Server Manager.
- Right-click Features and select Add Features.
- Expand .NET Framework 3.5.1 Features.
- Select the check box next to the .NET Framework 3.5.1
- Click on Install.