on access protection won't start

:'(I can’t get the avast symbol in the start try to function…Help please

Some information might not go amiss.
Can you be a little more detailed in the problem, are you saying there is no avast icon on the system tray, etc. ?

What Operating System are you using ? is it up to date ?
What avast! version home/pro 4.7.1001, etc. ?

Have (or did) you another AV installed in this system, if so what was it and how did you get rid of it ?

Do you mean that the icon is there but does not work?
Or do you mean you don’t have the icon?

If is the second,

  1. Check the option in the Appearance tab of settings.
    or
  2. Repair your avast installation through Control Panel.
    or
  3. Make a link to ashdisp.exe in your startup folder
    or
  4. Add the path to ashDisp.exe into a value named avast! in the Windows Registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    See picture here: http://forum.avast.com/index.php?topic=26155.msg213891#msg213891

If that does not help, please, uninstall, boot, install again, boot.