Temporarily turn off your antivirus or firewall during the installation process.
For system administrators and advanced users dealing with persistent installation records, changing the Upgrade Code can force Windows to treat the installation as a completely new product.
Solutions for "acrosup64.dll is not marked for installation" acrosup64.dll is not marked for installation
Are you deploying this on a or across an enterprise network ? Share public link
Method 3: Restart and Register the Windows Installer Service Temporarily turn off your antivirus or firewall during
Online installers often have connection issues or download corrupted components. The offline installer (full executable) is more reliable.
The error (frequently paired with Windows Installer Error 2753 ) occurs when a corrupted database or leftover registry key blocks Adobe Acrobat or Adobe Reader from updating, modifying, or completing an active setup. Share public link Method 3: Restart and Register
Always run Adobe installers with administrative privileges.