When I try to install Visual Studio 2012, I get the following error:
Visual Studio 2012 Prerequisites: Invalid Function
How can I solve this problem to install Visual Studio 2012?
This [rare?] Error occurs when you try to install Visual Studio with any or all add-ons such as Blend & / or Lightswitch or even none.
It can be resolved using the Visual Studio 2012 web installer.
Just rebooting the installation worked for me.
ISO - . , , - Service Pack.