Enter your legitimate 24-digit Adobe Acrobat XI Pro license key.
The file reference "11020" typically refers to an update patch, not the full installer. You cannot install the update without the base software. adobe acrobat xi pro 11020 install
Shut down web browsers, Microsoft Office applications, and email clients. Acrobat integrates plugins into these programs, and open software can cause installation failures. Enter your legitimate 24-digit Adobe Acrobat XI Pro
Click to permit the installer to modify the existing 11.0.0 core files. Microsoft Office applications