The strange case of VS 2010 Macros stop working after February 2014 Windows Update

I have noticed today that VS 2010 macros stopped working.

Fortunately the cause is known (a security patch of Windows Update) and there is a workaround. See:

Visual Studio 2010 Macros Stop Working after February 2014 Windows Update
http://visualstudioextensions.vlasovstudio.com/2014/02/13/visual-studio-2010-macros-stop-working-after-february-2014-windows-update/

and

http://social.msdn.microsoft.com/Forums/vstudio/en-US/590abd1d-2faa-4a35-9b9c-fe404406d6cd/what-the-visual-studio-2010-macros-not-working-after-windows-update