I might be blind, I don't know, but what I do know is that reinstalling grub will not overwrite your bcd. Grub first line of installation is done in the mbr. It does not touch your Windows files.
I am talking about letting your applications use the memory - instead of just letting it sit idle with your applications installed on it. They start faster, but then the memory just sits idle.
You would think that using the memory for data processing is more efficient than using it for application storage (it takes up double amount of memory this way).