You will need a Microsoft Account signup to be able to check out the download site, where there will be both 32-bit and 64-bit versions of the public beta for the masses to download, although there has been nothing specific on what this newly released beta will include. We do know that Microsoft did mention that this beta “includes previously unreleased fixes that were made specifically for this service pack. In addition to general product fixes, these fixes include improvements in stability, performance, and security as well as compatibility with Windows 8, Windows Server 2012, and Internet Explorer 10. The service pack beta also includes all the public updates and cumulative updates (hotfixes) that have been released since Service Pack 1. A full list of fixes will be available at the time of final release.”