Technical Report: Error 2753 - acrosup64.dll is Not Marked for Installation 1. Executive Summary The error message "The file 'acrosup64.dll' is not marked for installation" (often accompanied by Error 2753

. 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

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.