The primary feature of this patch is to close critical and Privilege Escalation vulnerabilities. Adobe's security bulletin (typically APSB16-26 or similar around that numbering) identifies that this patch:
: If Acrobat fails to connect to a DDE server after the update, try disabling your antivirus temporarily or use the Official Acrobat Cleaner Tool to reinstall cleanly. acrobatupd11023.msp