Applies To: Windows 8.1, Windows Server 2012 R2 The Windows Server 2012 R2, Windows Server 2012, Windows 8.1, and Windows 8 operating systems include an automatic update mechanism that downloads certificate trust lists (CTLs) on a daily basis. In Windows Server 2012 R2 and Windows 8.1, additional capabilities are available to control how the CTLs are updated. Important Software updates are availab