From June.18 to July.1 , the following hot-fix KB articles were released:

 

Windows 8.1 Preview

  • 2839636    Language packs are available for Windows 8.1 Preview
  • 2862783    Compatibility update for Windows RT 8.1 Preview and Windows 8.1 Preview is available through dynamic update: June 2013
  • 2863312    Compatibility update for Windows RT 8.1 Preview and Windows 8.1 Preview: June 2013
  • 2863204    Update improves Search charm performance in Windows 8.1 Preview
  • 2863721    Windows Store app is not added to the correct category in Windows 8.1 Preview

Best Regards,

KE Team