4. Use Revo Uninstaller to force removal 5. Extract MSI and install manually 6. Disable antivirus temporarily
: Stalled background threads block the installer package from modifying current local files.
This error happens because the gets confused by corrupted registry keys, incomplete uninstallation leftovers, or conflicts between old 32-bit versions and newer 64-bit packages. The setup wizard halts completely because it cannot safely overwrite or register the critical installation support file acrosup64.dll . What Causes the acrosup64.dll Error?
Click through the alphanumeric subfolders (keys) in this section. Look at the string on the right-hand panel. acrosup64.dll is not marked for installation
In a standard installation, the Windows Installer package (MSI) flags each of its components for installation. The installer is trying to access or configure this DLL file, but the Windows Installer service believes that this file should be part of the current operation. This mismatch in flags halts the entire process.
You may find websites offering acrosup64.dll for direct download. While these files exist, .
The most effective way to fix this issue is to completely remove all traces of Adobe Reader before attempting a fresh installation. Download the Adobe Acrobat Cleaner Tool. Run the tool, select "Acrobat Reader" in the dropdown menu. Click . Restart your computer. What Causes the acrosup64
The installation log contains the entry: acrosup64.dll is not marked for installation. The file acrosup64.dll is missing from the installed directory (e.g., C:\Program Files\Adobe\Acrobat DC\Acrobat\ ), and certain PDF operations (e.g., accessibility or save-as functions) fail.
For enterprise environments with SCCM (System Center Configuration Manager), you can create a task sequence that includes running AcroRead.msi and the corresponding .msp file manually.
Select all found registry items and data paths, click , and reboot your machine. Step 4: Isolate Installer logs via Windows Registry Locate the folder. If it exists
Sometimes the uninstaller does not remove all files. Residual folders under your user profile can trigger Error 2753. Press Windows Key + R to open the Run dialog box. Type C:\Program Files (x86) and press Enter.
Restart your computer and try installing the application again using an offline installer 2. Manually Clear AppData Folders
For users comfortable with Registry Editor (regedit), delete the following keys if they exist. Always backup your registry before making changes.
Locate the folder. If it exists, right-click and delete it.