The error "acrosup64.dll is not marked for installation" (often accompanied by Error 2753) typically occurs during an Adobe Acrobat or Reader update or installation. It indicates that the Windows Installer cannot find or properly register a specific file required for the 64-bit version of the software. 🛠️ Primary Fixes 1. Run the Adobe Acrobat Cleaner Tool
The most effective solution is to completely remove all traces of previous installations that might be corrupt. Download the Acrobat Cleaner Tool from Adobe. Select your product (Acrobat or Reader). Run the tool to wipe residual registry keys and files. Restart your computer. Download a fresh installer from the official Adobe site. 2. Manually Re-register the DLL
If the file exists but isn't "marked," you can try re-registering it via the Command Prompt.
Open the Start Menu, type cmd, right-click it, and select Run as Administrator.
Type the following command and press Enter:regsvr32 "C:\Program Files\Adobe\Acrobat DC\Acrobat\acrosup64.dll"(Note: Your file path may vary slightly depending on your version). If successful, try the installation again. 3. Clear the Windows Temp Folder Sometimes installer conflicts arise from temporary files. Press Windows Key + R, type %temp%, and hit Enter.
Delete all files in this folder (skip any that say they are "in use"). Try the installation again. 🔍 Why This Happens
Interrupted Updates: A previous update may have crashed, leaving the registry in a "half-installed" state.
Permission Errors: The Windows Installer may not have sufficient rights to write to the C:\Program Files directory.
Antivirus Blocking: Security software may mistakenly flag acrosup64.dll as a threat and block its registration. 💡 Troubleshooting Tips
Disable Antivirus: Temporarily turn off your antivirus or firewall during the installation process.
System File Checker: Run sfc /scannow in an Admin Command Prompt to ensure your Windows system files aren't corrupted.
Check Version: Ensure you aren't trying to install a 32-bit update over a 64-bit base version (or vice versa). Error 1723 - Problem with Windows Installer Package
The error message "acrosup64.dll is not marked for installation" (often appearing with Error 2753 ) typically occurs when installing or updating Adobe Acrobat Adobe Reader acrosup64.dll is not marked for installation
. It indicates a conflict where the installer script references a file that the system believes is already incorrectly present or is not designated for the current installation phase. Core Causes Corrupt Registry Entries
: Leftover keys from previous uninstalls or failed updates often block new installations. Installer Metadata Conflict AcroSup64.dll
(Acrobat 64-bit Installer Support file) may be orphaned in the system folders, causing the installer to fail when trying to "mark" it for a fresh setup. Damaged Local Files : Corrupted files in the Program Files
directories can prevent the Windows Installer service from correctly handling the DLL. Detailed Troubleshooting Solutions 1. Use the Adobe Acrobat Cleaner Tool The most effective first step is to use the official Adobe Acrobat Cleaner Tool
: Download and run the tool to scrub all traces of previous Acrobat/Reader versions.
: It removes hidden registry keys and files that standard uninstalls leave behind, resolving the "not marked for installation" conflict. 2. Manual Folder & Registry Cleanup
If the cleaner tool fails, manual intervention is often required to remove persistent orphaned data. Local AppData : Navigate to C:\Users\%userprofile%\AppData and delete the folder within the subfolders. Program Files : Delete any existing Adobe folders in C:\Program Files\Adobe C:\Program Files (x86)\Adobe Registry Keys : Delete keys under HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\ that start with or are otherwise related to Adobe Acrobat. 3. Use an Offline Installer
Web-based "stub" installers are prone to network interruptions that can trigger this error.
The error message "Error 2753: The File 'acrosup64.dll' is not marked for installation" typically occurs during an Adobe Acrobat or Reader update/installation when the Windows Installer service encounters a conflict with an existing, often corrupted, installation. Direct Solution: Complete Cleanup and Reinstall
The most effective way to resolve this error is a clean wipe of Adobe components before attempting a fresh installation. Run the Adobe Cleaner Tool:
Download the official Adobe Acrobat and Reader Cleaner Tool.
Run the tool and select Reader or Acrobat to remove all traces of previous versions, including registry keys and residual DLL files like acrosup64.dll. Manually Delete Residual Folders: The error " acrosup64
Navigate to C:\Program Files (x86)\Adobe (or C:\Program Files\Adobe) and delete any remaining folders.
Clear the user AppData folders: C:\Users\%username%\AppData\Local\Adobe and LocalLow. Use the Offline Installer:
Instead of the standard web installer, use the Adobe Acrobat Reader Offline Installer.
Right-click the downloaded file and select Run as Administrator. Technical Breakdown of Error 2753
Cause: This is a standard Windows Installer error (Internal Error 2753). It means the installer script is trying to register a file (acrosup64.dll) that it believes is not part of the current installation package or is already registered in a way that prevents overwriting.
Target File: acrosup64.dll is a support file for Adobe Acrobat/Reader, often related to 64-bit shell extensions or synchronization. Alternative Fixes error the file acrosup64.dll is not marked for installation
The “acrosup64.dll is not marked for installation” error is an MSI state inconsistency, not a missing file or disk error. Standard uninstall is insufficient. Adobe Cleaner Tool is the safest and fastest resolution. Manual registry editing is possible but risky for non-experts.
Estimated resolution time: 10–20 minutes using the cleaner tool.
The Frustrating Error
It was a typical Monday morning for John, a graphic designer, as he sat down at his computer to start his day's work. He had a deadline to meet and was eager to dive into his project. However, as he booted up his computer and tried to launch Adobe Photoshop, he was greeted with an error message that made his heart sink:
"The file acrosup64.dll is not marked for installation."
John had no idea what this error meant or how to fix it. He tried restarting his computer, but the error persisted. He then attempted to reinstall Adobe Photoshop, thinking that maybe the installation had gotten corrupted, but that didn't work either. Causes
The Search for a Solution
Frustrated and running out of time, John turned to his trusty search engine to find a solution. He typed in the error message, along with his version of Windows and Adobe Photoshop, hoping to find someone who had encountered the same issue.
After scrolling through several forums and blogs, John came across a post from a user who had experienced a similar error. The user had mentioned that the problem was caused by a missing or corrupted file in the Windows registry.
John decided to try the suggested solution, which involved using a registry cleaner to fix the issue. He downloaded and installed the software, then ran a scan to identify and fix any problems.
The Breakthrough
As the registry cleaner finished its scan, John held his breath, hoping that it would find and fix the issue. A few minutes later, the software reported that it had found a problem with the acrosup64.dll file and had successfully repaired it.
John rebooted his computer and launched Adobe Photoshop once again. This time, the software launched without any errors, and John was able to start working on his project.
The Lesson Learned
John learned a valuable lesson that day: even the most obscure error messages can be resolved with patience, persistence, and the right guidance. He also realized the importance of regularly maintaining his computer's registry to prevent such issues from arising in the future.
From then on, John made sure to regularly clean and optimize his computer's registry, and he was able to work on his projects without any interruptions.
The Moral of the Story
The story of acrosup64.dll not being marked for installation serves as a reminder that:
By following these principles, you can overcome even the most frustrating errors and get back to work with minimal disruption.