Real-Time shields has turned off!

My realtime shields have randomly turned off. I turned on my laptop tonight and my action centre for windows 7 was telling me that my anti virus wasn’t working. So I checked my realtime shields and they werent showing up. My scanner is working but the real-time shields arn’t. I tried to turn it on from my command centre but it wasn’t working. I do not know how to turn it on in Avast!. I am using the free version of Avast! I need solution IMMEDIATELY due to me being a heavy internet user.

Repair avast!:

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

Do you have any (recent) unpXXXXX.tmp files (X are some numbers) in C:\Users\All Users\AVAST Software\Avast\log folder?