problem with allowing avast internet access

General Topics
1 
  Hello , 
        I am not a very computer literate person and I desperately need help in allowing avast to access the internet . I used to get an alert asking me what I wanted to allow avast to do , but now I am getting a notice telling me that avast cannot access the internet . What do I need to do ? I am currently running a scan , but it is unable to  adequately scan without internet access and I cannot find out how to allow the access anywhere . Please help ! 
                                    Thank you !
                                              Diane
2

Into the firewall settings, the following programs should be allowed to connect:

C:\Program Files\Alwil Software\Avast4\ashWebSv.exe (avast! Web Scanner)
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe (avast! e-Mail Scanner Service)
C:\Program Files\Alwil Software\Avast4\Setup\avast.setup (avast! Update executable). This is a temporary file that just appears when an update (check) is about to launch, and disappears again afterwards.

Don’t need rights to connect:
C:\Program Files\Alwil Software\Avast4\ashServ.exe (avast! antivirus service)
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe (avast! Update Service)