Since the install is silent, logs are your only eyes.

: For the most reliable results, Ansys recommends running as an administrator with User Account Control (UAC) turned off .

A failed silent install is harder to debug than a failed GUI install because you don't see the error popup. Prepare thoroughly.

Installation completes perfectly, but ANSYS crashes on launch with "Cannot connect to license server." Cause: The response file set LICENSE_TYPE=local or an old server hostname. Fix: Install silently again using the ansyscl.exe license manager tool:

-prereq : Installs required third-party libraries (like Microsoft Visual C++ Redistributables) automatically before the main installation.

Automating software removal or upgrades requires a silent uninstall command. Ansys provides an uninstaller executable in the installation directory. "C:\Program Files\Ansys Inc\v261\Uninstall.exe" -silent Use code with caution.