VS2012 error every time I start. Message is not helpful - any suggestions?

Question

WHen I start VS2012 I always get an exception tellng me to look at ActivityLog.xml. Here is what I see- useless to me. Hoping someone else has seen this before. Also - VS2012 eats 100% of the CPU on the machine at time. Hoping the two are related and fixable.

System.ComponentModel.Composition.CompositionException: The composition produced a single composition error. The root cause is provided below. Review the CompositionException.Errors property for more detailed information. 1) The current type, SquaredInfinity.Foundation.Configuration.Services.IConfigurationService, is an interface and cannot be constructed. Are you missing a type mapping? Resulting in: Resolution of the dependency failed, type = "SquaredInfinity.Foundation.Configuration.Services.IConfigurationService", name = "(none)". Exception occurred while: while resolving. Exception is: InvalidOperationException - The current type, SquaredInfinity.Foundation.Configuration.Services.IConfigurationService, is an interface and cannot be constructed. Are you missing a type mapping? ----------------------------------------------- At the time of the exception, the container was: Resolving SquaredInfinity.Foundation.Configuration.Services.IConfigurationService,(none) Resulting in: An exception occurred while trying to create an instance of type '#Btb.#Rtb'. Resulting in: Cannot activate part '#Btb.#Rtb'. Element: #Btb.#Rtb --> #Btb.#Rtb Resulting in: Cannot get export '#Btb.#Rtb (ContractName="Microsoft.VisualStudio.Text.Classification.IClassifierProvider")' from part '#Btb.#Rtb'. Element: #Btb.#Rtb (ContractName="Microsoft.VisualStudio.Text.Classification.IClassifierProvider") --> #Btb.#Rtb 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__DisplayClass42.<CreateStronglyTypedLazyOfTM>b__1()
 at System.Lazy1.CreateValue() at System.Lazy1.LazyInitValue()
 at System.Lazy1.get_Value() at Microsoft.VisualStudio.Text.Utilities.GuardedOperations.InvokeMatchingFactories[TExtensionInstance,TExtensionFactory,TMetadataView](IEnumerable1 lazyFactories, Func2 getter, IContentType dataContentType, Object errorSource)

Answer 1

Is your VSCommands extension up to date? There was a compatibility issue which could produce similar stack trace, and it was fixed in latest release.