Acrosup64.dll Is Not Marked For Installation ((link)) Jun 2026

acrosup64.dll should be installed to the product folder as part of the core Acrobat installation.

Acrosup64.dll is a legitimate Windows DLL file known as "Acrobat 64 bit Installer Support," developed by Adobe Systems Incorporated. It is a dynamic link library file that stores information and instructions for executable files, allowing multiple programs to share the same code and save memory resources. This file is typically associated with Adobe Acrobat DC and is distributed as part of the Adobe Acrobat software package.

Navigate to the following path: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\ acrosup64.dll is not marked for installation

The problem is rarely caused by the file itself. Instead, it stems from how Windows tracks installed software:

By systematically working through the solutions—starting with Adobe's official Cleaner Tool, moving to manual deletion, and then to advanced MSI extraction for enterprise users—you can bypass the error and successfully install your software. If you are an administrator looking to resolve this at scale, standardizing on the base MSI plus manual MSP patching is the most reliable path forward. acrosup64

Download a fresh, offline installer for Adobe Reader from the official Adobe website and install it. Solution 2: Perform a Clean Manual Uninstallation

Adobe provides a dedicated cleaner that removes all traces of previous installations. This file is typically associated with Adobe Acrobat

This is rarely a "virus" or a "corrupt OS." It is a .

This issue typically stems from one of the following root causes:

Aggressive security software can lock acrosup64.dll during extraction, triggering the installation failure. What Windows operating system version are you running?

The acrosup64.dll file manages 64-bit installer configurations. If the registry claims the file exists but the physical file is missing (or vice versa), the installer aborts with Error 2753.