The June 2016 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 fixes issues and includes performance and reliability improvements. We recommend that you apply this update rollup as part of your regular maintenance routines. Check out the fixed issues in this update. Also, see the prerequisite and restart requirement for installing this update.
Read more: June 2016 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2