Acrosup64.dll Is Not Marked For Installation — !!install!!

The error means:

Instead of the standard web installer, use the Adobe Reader Enterprise/Offline Installer . acrosup64.dll is not marked for installation

The error appears during installation, repair, or update of Adobe Acrobat/Reader. The installer may roll back or stop without completing. The error means: Instead of the standard web

Microsoft offers a dedicated tool to fix Windows Installer corruption. acrosup64.dll is not marked for installation

You cannot delete the old file normally. You need to take ownership.