Do not click "Install Now" on the main screen. Choose the pathway to save disk space and improve software responsiveness.

: Install the following from the 3rd Party Redistributables folder on the installation media: Microsoft .NET Framework (4.8 or later). Microsoft SQL Express 2014 SP3 (required for the database). Windows Installer 4.5 or higher. 2. Step-by-Step Installation Process

💡 Always run the installer as an Administrator . Even if your account has admin rights, right-clicking the Setup.exe and choosing "Run as Administrator" ensures the installer has the depth of permissions needed to write to the Windows Registry and System32 folders.

: When prompted for the License Server, enter your institution's or company's server address (e.g., ://yourdomain.com ) and click Add Server . 4. Post-Installation & Troubleshooting

If you are on an institutional network, enter the exact IP address or hostname of your organization's license server. 4. Run the Installation

: If you are using a network license, the SLM (Software License Manager) Server must be upgraded to V12 before you install the client software to prevent incompatibility.

Follow this sequence exactly to ensure all shared databases and process modeling tools link correctly. Step 1: Mount or Extract the Installer

: After a fresh boot, wait 3 to 5 minutes before launching HYSYS to allow the background license services to start fully.