According to community posts, Nitro Pro 9 is unsupported, and its activation servers have been shut down. Users attempting to install older versions (v9-v12) often encounter activation issues, as modern security standards require v13 or v14.
6. Silent Installation (for IT deployment)
Command line (MSI)
msiexec /i "Nitro_Pro_9.5.1.5_x64.msi" /quiet /norestart SERIALKEY="XXXXX-XXXXX-XXXXX-XXXXX-XXXXX"
- Disable hardware acceleration: Open Nitro → File → Preferences → General → Untick “Use hardware acceleration.”
- Or run in Windows 7 compatibility mode (right-click shortcut → Properties → Compatibility).
- Operating System: Windows 7/8/8.1/10 (32-bit or 64-bit)
- Processor: 1 GHz or faster processor
- RAM: 2 GB or more
- Disk Space: 2.5 GB or more of free disk space
Note: Nitro Pro 9 is legacy software. While it works on older operating systems, it may not be fully compatible with Windows 11 or modern web browsers. For professional use, consider the latest version of Nitro PDF Pro.