ANSYS relies heavily on temporary scratch space. If these folders become bloated or contain corrupted data from a previous crash, ansyswbu.exe will fail to launch.
ANSYS creates massive files during the solution phase. If your drive runs out of space, the executable will simply terminate. ANSYS relies heavily on temporary scratch space
Also check AppData\Roaming\Ansys\vXXX (where XXX is your version) and consider renaming the version folder to vXXX_old to reset your user preferences. 2. Graphics Card Drivers and Hardware Acceleration ANSYS relies heavily on temporary scratch space