Unknown error XAML

Question

Just started learning WP7 platform. Don't even know how to describe occurred error. It happens all the time when I'm creating new project (Silverlight for Windows Phone project).

System.Exception
Catastrophic failure (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))
   at MS.Internal.XcpImports.CheckHResult(UInt32 hr)
   at MS.Internal.XcpImports.FrameworkElement_MeasureOverride(FrameworkElement element, Size     availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(Size availableSize)
   at System.Windows.FrameworkElement.MeasureOverride(IntPtr nativeTarget, Single inWidth, Single    inHeight, Single& outWidth, Single& outHeight)

Answer 1

Re-installing Windows solved this mysterious problem.