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
. 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 "acrosup64.dll is not marked for installation" (often labeled as Error 2753) typically occurs when trying to install, update, or uninstall Adobe Acrobat or Acrobat Reader. It usually signifies that a leftover file or registry key from a previous installation is conflicting with the current process. 🛠️ Primary Fixes
Use the Adobe Cleaner Tool: This is the most successful solution. Download the Acrobat Cleaner Tool to completely remove all traces of Adobe products before attempting a fresh install. Manually Delete AppData: Uninstall Adobe via the Control Panel. Navigate to C:\Users\%userprofile%\AppData.
Delete the Adobe folder from Local, LocalLow, and Roaming directories. Restart your computer and try the installation again.
Offline Installer: Use the full offline installer rather than the standard web installer to bypass common download-related setup errors. 💻 Advanced Troubleshooting
Manual File Removal: If you cannot uninstall, manually delete the Acrobat DC or Reader folder found in C:\Program Files (x86)\Adobe or C:\Program Files\Adobe.
SFC Scan: Corrupted system files can trigger DLL errors. Run sfc /scannow in an Administrative Command Prompt to repair Windows system files.
Microsoft Install/Uninstall Troubleshooter: Use the Microsoft Program Install and Uninstall troubleshooter to fix corrupted registry keys that block updates. 🔍 Key Context error the file acrosup64.dll is not marked for installation acrosup64.dll is not marked for installation
"acrosup64.dll is not marked for installation" (often appearing with Error 2753
) typically occurs during an Adobe Acrobat or Reader update/installation when leftover files from a previous version conflict with the new installer. Key Findings & Review Root Cause
: It generally signifies that the installer is attempting to place a file that it believes is already present or was incorrectly registered by a prior installation. This often happens after a system crash, an incomplete uninstallation, or when moving files to a new drive (like an SSD). Reliability of Official Fixes
: Most users find that the standard "Add/Remove Programs" uninstaller is insufficient to clear the conflict. Adobe's dedicated cleanup utility is frequently cited as the first necessary step for a successful resolution. User Consensus : Community feedback on the Adobe Support Community suggests that manual deletion of Adobe folders in
and specific registry keys is often required when automated tools fail. Commonly Recommended Solutions
"acrosup64.dll is not marked for installation" (often accompanied by Error 2753
) typically occurs during an Adobe Acrobat or Reader installation when a previous version wasn't fully removed, or the installer package is corrupted. Quick Fixes for "acrosup64.dll" Error Run the Adobe Cleaner Tool : This is the most successful solution. Use the official Adobe Acrobat Cleaner Tool
to wipe any leftover registry keys or files from failed previous installations. Use the Offline Installer
: Download the full enterprise/offline installer rather than the standard web installer to ensure all components are present. Manual Folder Cleanup Delete the Adobe folder in C:\Program Files (x86)\Adobe Navigate to C:\Users\%userprofile%\AppData and remove Adobe folders from Re-register Windows Installer (Win + R). msiexec /unreg and hit Enter. msiexec /regserver and hit Enter. Advanced Deployment Fix (for IT Admins)
If you are deploying via GPO or SCCM and seeing this error, try extracting the Extract the installer using a tool like or CMD commands. AcroRead.msi file directly from the extracted folder. Manually apply any
update files included in the extraction if the base installer fails. Why Is This Happening? Residual Files
: The installer thinks a "lesser" version is still installed because of orphaned registry entries. Corrupted DLL acrosup64.dll
file (part of the Adobe Support components) may have been flagged incorrectly in the installation script. Code Signing Issues
: In rare cases, Windows may fail to verify the digital signature of the DLL, requiring a clean OS state or certificate update. direct download links for the latest offline installer or the specific registry keys that need manual deletion? error the file acrosup64.dll is not marked for installation
Adobe provides a dedicated cleaner that removes all traces of previous installations. The error message "acrosup64
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 error "acrosup64.dll is not marked for installation" (often labeled as Error 2753) typically happens because of corrupted leftovers from a previous Adobe installation or a conflict between 32-bit and 64-bit components. The Most Effective Fix: Full Clean & Manual Install
The community consensus is that standard uninstalling isn't enough; you must wipe the "ghost" files first. Run the Adobe Cleaner Tool: Download and run the Acrobat Cleaner Tool.
Select "Reader" or "Acrobat" (whichever you're trying to fix) and let it remove all registry keys and temp files. Manually Delete AppData Folders:
Press Win + R, type %LocalAppData%, and delete the Adobe folder. Do the same for %AppData% (Roaming) and %ProgramData%. Use an Offline Installer:
Instead of the standard web installer, use the Adobe Reader Enterprise/Offline Installer.
Pro Tip: If the installer still fails, use a tool like 7-Zip to extract the .exe files and manually run the AcroRead.msi found inside. Advanced Workarounds If the steps above don't work, try these "deep" fixes:
Extract and Patch: If you are deploying via GPO or SCCM, manually extract the MSI and the MSP (patch) file into a new folder. Use the command line msiexec /a [path_to_msi] /p [path_to_msp] to administrative-install the patched version into a flat folder before running the final setup.
Disable the Update Service: If the error pops up during daily use (not just installation), go to Services.msc, find "Adobe Acrobat Update Service," and set it to Disabled to stop the broken update loop.
Registry Check: Ensure there are no lingering keys for older versions (like Acrobat XI) under HKEY_LOCAL_MACHINE\SOFTWARE\Adobe.
Are you trying to do a fresh personal install, or are you deploying this across a network using SCCM? error the file acrosup64.dll is not marked for installation
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. Download Adobe Acrobat Cleaner Tool from Adobe’s official
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
This is rarely a "virus" or a "corrupt OS." It is a version mismatch and ACL (Access Control List) conflict.
Here is the technical cascade:
acrosup64.dll into C:\Windows\System32 or C:\Windows\SysWOW64.In short: The installer sees a ghost. It knows the file should be there, but it has no instructions on what to do with it.
The most effective way to resolve installer database conflicts is to remove the corrupted installation entirely and start fresh. Standard uninstallation often leaves behind the registry keys causing the error. Adobe provides a dedicated tool for this.
Why this works: It strips the "marked for installation" flag from the registry entirely, forcing a clean write of all DLL files during the new install.