Lost Avast icon on task bar

General Topics
1

Avast icon does not appear on task bar… program seems to be working but no conformation on task bar.
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2
  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.

What other security based software do you have that might block new startup entries, e.g. Spybot S&D (TeaTimer), AdAware (AdWatch), SpySweeper, Spyware Doctor (StartUpGuard), PrevX, WinPatrol, ProcessGuard, etc.?