Before downloading Adobe Acrobat 9 Pro, ensure your system meets the minimum requirements:
Websites offering "free full version" downloads of paid software often bundle the installer with malware, spyware, or trojans. Since Acrobat 9 is no longer supported by Adobe, your computer’s operating system may not be able to protect you from vulnerabilities within the outdated software itself. 2. Compatibility Issues --- Adobe Acrobat 9 Pro Free Download Full Version