Sandbox transparent display window

I run an install.exe and it runs ok but Avast sandbox displays as a transparent/blank overlay on my install process.

I turned of Sandbox in my Avast settings but this sandbox window always shows up

Repair Avast:

  1. Control Panel → Add/Remove programs → Avast
  2. Click on ‘Repair’.
  3. Follow instructions.
  4. Reboot.