Acrosup64.dll Is Not Marked For - Installation !!top!!
Download the version corresponding to your software (Acrobat or Reader).
Sometimes, the registry still holds a reference to the file that the installer cannot access. Open the Command Prompt as Administrator.
You will likely see this error in the following situations:
Download the tool from the official Adobe Reader and Acrobat Cleaner Tool page. acrosup64.dll is not marked for installation
Few things are more frustrating than an application refusing to install, especially when you're met with an obscure, cryptic error message. For IT administrators and home users alike, the "acrosup64.dll is not marked for installation" error has been a persistent and vexing problem associated with Adobe Acrobat and Adobe Reader. This error typically presents itself as and can effectively prevent you from installing, updating, or even uninstalling Adobe software.
When an installer checks for this file’s presence or registration state, the "not marked for installation" flag indicates a in Windows Installer’s internal database.
Standard uninstallation through the Control Panel often leaves behind traces that cause this error. Adobe provides a dedicated cleanup utility to wipe the system clean. Download the version corresponding to your software (Acrobat
The Windows Installer is trying to perform an operation (e.g., uninstall, repair, or update) on the acrosup64.dll file, but the internal MSI database indicates that this file should NOT be installed in the current context.
Think of it like a grocery list: The list says "Buy milk." But next to "milk," there is no checkmark. The shopper (Windows Installer) sees the instruction but lacks the authorization to pick it up.
Aggressive security software can lock acrosup64.dll during extraction, triggering the installation failure. What Windows operating system version are you running? You will likely see this error in the
This issue frequently spikes during automated system rollouts via enterprise tools like SCCM or Group Policy Objects (GPO). Step-by-Step Fixes for Consumers and IT Pros
Run the executable and follow the prompts to remove both and Reader . Restart your computer.
Temporarily turn off your antivirus or firewall during the installation process.
Security software may mistakenly flag acrosup64.dll as a threat and block its registration. 💡 Troubleshooting Tips
The downloaded update file or installer package is incomplete.
