Update: As of summer 2015 Biber is also included in the 64-bit repositories for MikTeX. There is no need to install Biber manually any more, it can simply be installed via the Package Manager just like other packages.
The question Biblatex + Biber + Texmaker + MiKTeX describes how to use Biber with MiKTeX. But on the 64-bit version of MiKTeX Biber isn't installed.
How it is possible to install Biber on a 64-bit version of Windows?
Can I use this file?