Search for "UAC" in Windows. Drag the slider to Never Notify . Restart your PC.
Windows Defender or McAfee will quarantine the license patcher. Disable "Real-time protection" until the reboot.
Struggling with the Aspen HYSYS installation? Follow this step-by-step guide to download, install, and license Aspen HYSYS for process simulation. Aspen HYSYS is the gold standard for process simulation in the oil, gas, and chemical industries. However, downloading and installing it is notoriously tricky. Between license servers, SQL databases, and Windows firewalls, it is easy to brick the installation.
The Engineer’s Guide: How to Download and Install Aspen HYSYS (V14 & V12)
Click Install. Go get a coffee. This takes 30–45 minutes. Phase 4: Post-Installation & Licensing Once the installation finishes (Do not reboot yet if the license setup is pending).
HYSYS is allergic to spaces. Go to Settings > About > Device Name . If your PC is named "John-PC," you are fine. If it is "John’s Laptop," rename it to "John-Laptop" and restart.
The installer will attempt to install SQL Server 2019 Express. Do not close this window. It takes 10-15 minutes. If it fails, you must manually install SQL Server prior to retrying.
