问题
I have been encountering this error while trying to load Visual studio 2012, An exception has been encountered.This may be caused by an extension and was given a location for additional information in C:\Users\~\AppData\Roaming\Microsoft\VisualStudio\11.0\ActivityLog.xml and in checking the location I have the following as error I clearly don't understand it:
Microsoft.Internal.Assumes+InternalErrorException: Internal error occurred.
Additional information: ''. at System.ComponentModel.Composition.Hosting.ImportEngine.InPrerequisiteLoop() at
System.ComponentModel.Composition.Hosting.ImportEngine.TrySatisfyImportsStateMachine(PartManager partManager, ComposablePart part) at
System.ComponentModel.Composition.Hosting.ImportEngine.TrySatisfyImports(PartManager partManager, ComposablePart part, Boolean shouldTrackImports) at
System.ComponentModel.Composition.Hosting.ImportEngine.SatisfyImports(ComposablePart part) at
System.ComponentModel.Composition.Hosting.CompositionServices.GetExportedValueFromComposedPart(ImportEngine engine, ComposablePart part, ExportDefinition definition) at
System.ComponentModel.Composition.Hosting.CatalogExportProvider.GetExportedValue(CatalogPart part, ExportDefinition export, Boolean isSharedPart) at
System.ComponentModel.Composition.Hosting.CatalogExportProvider.CatalogExport.GetExportedValueCore() at System.ComponentModel.Composition.Primitives.Export.get_Value() at
System.ComponentModel.Composition.ExportServices.GetCastedExportedValue[T](Export export) at System.ComponentModel.Composition.ExportServices.<>c__DisplayClass4`2.<CreateStronglyTypedLazyOfTM>b__1() at System.Lazy`1.CreateValue() at
System.Lazy`1.LazyInitValue() at System.Lazy`1.get_Value() at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.InvokeMatchingFactories[TExtensionInstance,TExtensionFactory,TMetadataView](IEnumerable`1 lazyFactories, Func`2 getter,IContentType dataContentType, Object errorSource)
has anyone ever encountered this error?
回答1:
Remove all entries under these
HKEY_CURRENT_USER\Software\Microsoft\VSCommon
HKEY_CURRENTUSER\Software\Microsoft\VisualStudio
_
Upon restarting Visual Studio, it ran me through the 'first time' processes, which means my user profile was completely reset. That resolved my issues.
I too had this problem and took 1 week+ to find out this solution for the problem... :)
回答2:
I had the same error before as well. In Visual Studio, try going to TOOLS then Extensions and Updates... and check to see if you need any updates. That worked for me.
Also check out this thread on one of the MSDN forums. The guy asking the question said he solved this problem by re-installing VS 2012 Update 1.
回答3:
I have seen similar issues resolved by installing the latest Updates to Visual Studio.
Please install the latest Update 3 and see if that fixes your problem.
回答4:
A simple repair of Visual Studio fixed my issue.
来源：https://stackoverflow.com/questions/17629418/microsoft-internal-assumesinternalerrorexception-internal-error-occurred