Acrosup64.dll — Is Not Marked For Installation

The "acrosup64.dll is not marked for installation" error typically occurs when there's an issue with the installation or registration of the acrosup64.dll file, which is a crucial component for certain applications or services on your system. This guide provides step-by-step instructions to resolve the issue.

This error occurs because the Adobe installer uses Windows Installer (MSI) technology. The file acrosup64.dll (Adobe Acrobat Support Library, 64-bit) is listed in the MSI package but its installation state is not set to "Local" (i.e., installed) — typically due to:

In MSI terms, a component marked "Null" or missing the msiInstallStateLocal flag will trigger this error.

The "acrosup64.dll is not marked for installation" error is a Windows Installer state mismatch, almost always caused by leftover Adobe installation data. It is fixable without reinstalling Windows.

Recap of the most reliable fixes:

By methodically working through the solutions above, you will clear the error, save hours of frustration, and get back to using your Adobe software normally. Always remember to back up critical data before editing the registry or running system-level repairs. acrosup64.dll is not marked for installation

If this guide helped you, consider sharing it with others who encounter the same cryptic message—they’ll thank you for saving their sanity.

The error message "Error 2753: The File 'acrosup64.dll' is not marked for installation" typically occurs when installing or updating Adobe Acrobat Adobe Reader

. It indicates that the Windows Installer has encountered a conflict with a specific DLL file, often due to corrupted registry keys or leftover files from a previous installation. Recommended Fixes 1. Use the Adobe Acrobat Cleaner Tool

This is the most common and effective solution. It removes all traces of previous installations that might be causing the "not marked for installation" conflict. Download the official Acrobat Cleaner Tool

Run the tool and select the product version you are trying to fix. The "acrosup64

Restart your computer and try installing the application again using an offline installer 2. Manually Clear AppData Folders

If the cleaner tool doesn't work, manual removal of cached files may be necessary: Uninstall Adobe via the Control Panel Navigate to C:\Users\%username%\AppData In each of the folders, find and delete the Restart your PC before re-attempting the installation. 3. Advanced Registry Cleanup (For Experienced Users)

If you are comfortable with the Windows Registry, you can search for and delete specific product keys that are stuck. and navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\ Look for keys starting with

(common for Adobe products) or any folder that mentions "Adobe" or "Acrobat" inside its registry values.

Back up your registry before deleting anything, as mistakes can cause system instability. 4. Repair Visual C++ Redistributables In MSI terms, a component marked "Null" or

Sometimes, missing or corrupted dependencies cause DLL errors. Adobe Help Center Control Panel > Programs and Features Microsoft Visual C++ Redistributable (specifically versions from 2013 onwards). Select each one and click Adobe Help Center Summary of Causes error the file acrosup64.dll is not marked for installation 4 Jan 2015 —

If you are reading this, you have likely just been stopped dead in your tracks by a dialog box that makes very little sense. You are trying to install a piece of software—perhaps a printer driver, a Lenovo system utility, or an audio interface driver—and Windows Setup has thrown a cryptic error:

"acrosup64.dll is not marked for installation."

You didn't ask to mark anything. You just wanted to install a program. So, what is going on?

This error is a perfect example of modern computing's fragility: a single, tiny DLL file (Dynamic Link Library) standing between you and your software. This post will dissect why this happens, what this file actually does, and the specific, surgical steps to fix it without breaking your OS.

1. File Identity

2. Root Cause The phrase "not marked for installation" is a generic Windows Installer error. It occurs when the installer attempts to process a component but the installation logic dictates that the component should not be installed, often due to: