The boot configuration data store could not be opened.

While trying to perfect the dual boot configuration of my PC I installed a tool called EasyBCD and added menu options to my Windows 7 boot menu to allow me to boot my Mac OSX parition. It didn't work so I switched to the Chameleon boot loader (which I successfully installed using a tool called Multibeast).

I then uninstalled the EasyBCD program thinking it would remove the extraneous options from my boot menu.

It did not. Instead, it made it impossible to edit the boot menu using the normal Microsoft tools because for some reason it set the hidden and system attributes on the "c:\boot\bcd" file so that when I tried to use the microsoft bcdedit command line tool (which requires a CMD prompt run in administrator mode) it reported "the boot configuration store could not be opened". After messing around and even trying windows recovery mode, I finally spelunked and discovered that the file attributes were changed.

The solution:

After using attrib I was able to use EasyBCD to remove the extra items from the boot menu.