firewall unreachable

i am running windows 7, i have checked and dont believe i am running any other antivirus, but it keeps telling me in avast that i am fully connected but protection is unknown and the firewall is off-wont let me turn on, and says its unreachable… PLEASE HELP!!! also i have the avast internet security version

                 and is anyone else have trouble reaching tech support?

Repair avast!:

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