Mrunali Barde

Hello Tarek, 

Was the installer downloaded from the Ansys website?

Can you try:
1. Go to "C:\Users\< username>\AppData\Roaming\Ansys" and rename the Ansys folder to Ansys.old

2. Check if the graphics card & drivers are updated, you can go to to update NVIDIA graphics drivers.

3. Reinstall a fresh setup

Do let me know if this helps.