avast 2015 firewall problem

Avast Free Antivirus / Premium Security
1

i have avast 2015 registered my all services are working like sandbox and safezone but firewall not working it always says reboot your computer ,
i rebooted my computer like 10 times but nothing change it always says reboot

plz help asap

screenshot is attached

2

Repair Avast:

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