HandBrake is a open-source tool, built by volunteers, for converting video from nearly any format to a selection of modern, widely supported codecs.

How to Install libdvdcss on Windows
First, you’ll need to download libdvdcss to your computer. For 32-bit versions of Windows, download this version. 64-bit users should download this version.

Copy the .dll file to your Handbrake program folder. If you used the default installation settings, this should be in C:\Program Files\Handbrake.