If you turn source code control on, Visual Studio .NET 2003 or Visual Studio 2005 tries to load the corresponding Microsoft Source Code Control Interface (MSSCCI) provider when you try to open a project or when you try to create a project. However, an MSSCCI provider that is registered in the Microsoft Windows Registry by using the relative path of the corresponding DLL may pose a security threat to your computer. Therefore, before Visual Studio .NET 2003 or Visual Studio 2005 loads an MSSCCI provider, Visual Studio .NET 2003 or Visual Studio 2005 verifies whether any MSSCCI provider on your computer is registered by using a relative path.
If any MSSCCI provider on your computer is registered by using a relative path, the behavior that is mentioned in the "Symptoms" section occurs.