For many users, this version represents the pinnacle of the "Classic" Acrobat experience before the interface became heavily simplified and cloud-integrated in later years. Security Focus : This patch specifically introduced AppContainer
: Introduced a beta feature for Windows 8 and newer, allowing the "Protected Mode" sandbox for Acrobat Reader to run within an AppContainer for enhanced security isolation. Major Bug Fixes : adobe acrobat pro dc 201502320053 full patch latest fix