Visual Studio Errors when invoking right-click menu

This indicates the menus have not registered correctly as part of the installation.

Please run the Visual Studio command prompt:
Start->Programs->Micorsoft Visual Studio 2005->Visual Studio Tools->Visual Studio Command Prompt

This will launch a command window with the paths correctly setup for Visual Studio.

In the Command window run:
devenv /setup

Restart Visual Studio and the menus should work correctly.