Note:
This document explains the problem and solutions for latest versions of Acrobat. If you have Acrobat XI or earlier, see Adobe PDF creation cannot continue because Acrobat is not activated | Older versions of Acrobat.
When you try to create a PDF using Adobe PDF Printer or the Convert to Adobe PDF (PDFMaker function) feature from various applications, you see the following error:

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After the selected file is converted to PDF, end the AcroTray.exe process using the Task Manager. To do so, follow the steps suggested in Solution 1 above.
Programs that scan virus can conflict with the activation process of Acrobat. Before you activate Acrobat, temporarily disable such programs:
- Virus protection software (for example, McAfee, Norton Anti-Virus)
- Firewall software (for example, ZoneAlarm, Norton Internet Security Suite)
- Software that stores deleted files or remove temporary files from the system (for example, Norton SystemWorks)
For instructions on how to disable or enable a program, see its documentation. To disable firewall software, contact your system administrator.
Note:
Disabling the software firewall can leave your computer vulnerable. Disabling the software does not ensure that all functions of the software are disabled.