The software relies on third-party drivers to communicate with the USB key. The driver included on your original installation CD might be incompatible with modern operating systems like Windows 10 or Windows 11.

When you see the "Hardware Key Not Found" error, it means the software cannot communicate with the USB dongle. This communication failure typically stems from one of three areas:

Disclaimer: This article is for educational and troubleshooting purposes. Users are responsible for complying with their software licensing agreements. Always scan downloaded drivers for malware before installation.

Ensure your Windows Firewall is not blocking network port 1947 , which the HASP driver uses for local communication. 6. Run Parashara's Light in Compatibility Mode

for the Sentinel or WibuKey drivers compatible with your current operating system?

Sometimes, modern USB 3.0 (blue) ports do not communicate well with older dongles.

| Software | Price | Hardware Key? | Windows 11 Native? | Best For | | :--- | :--- | :--- | :--- | :--- | | | Free | No | Yes (Java-based) | Precision calculations, research | | AstroSage Kundli | Freemium | No | Yes | Quick chart generation, modern UI | | Kala | $400+ | No (software license) | Yes | Professional astrologers, advanced KP | | Parashara Light 10 | $450+ | No | Yes | Traditional PL users, familiar interface | | Planetdance | Free/Donation | No | Yes | Enthusiasts, extensive modules |

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If the list is empty, your computer is not detecting the USB key at a system level. 4. Enable the Sentinel Local License Manager Service

To avoid this error in the future, keep the following best practices in mind:

The error in Parashara's Light 9.0 typically occurs when the software cannot detect the required USB dongle due to outdated drivers, power management issues, or physical connection problems . Quick Fixes