How To | Install Aspen Hysys V12 Better 'link'
: If you have Aspen V11 or older versions installed, running them side-by-side often corrupts the shared file paths. Perform a clean uninstall of older versions before moving forward. Temporarily Disable Antivirus & Windows Defender
Navigate to C:\HYSYS_V12_Setup\Prerequisites and install in this order: how to install aspen hysys v12 better
Once installed, HYSYS V12 can be heavy on resources. To make it run "better" and faster: : If you have Aspen V11 or older