"This is a technical beta release. Before you decide whether to install this software, it is important to understand that the technical beta release does not have the stability of released Microsoft software. You might encounter problems with this release of the software that could possibly result in a loss or destruction of data. This release is not for production use, and we suggest that you run the software in a test environment or back up your existing data, including music and video files, before you install and run the software on your computer..."