Can you try to repair your installation?
Go to Control Panel > Add/Remove programs > avast! antivirus > Remove. Then choose Repair function in the popup window (Repair).
If this does not help, can you uninstall / boot / install / boot again?
Uninstall avast from Control Panel (if possible). If, for any reason, you can’t run it, try booting in Safe Mode and doing it from there. Anyway, boot after that.
Run the avast! Uninstall Utility saved on 1. If, for any reason, you can’t run it, try booting in Safe Mode and doing it from there. Anyway, boot after you’ve run it.
Install avast! using the setup saved on 2. Boot.
Register your free copy or add the license key for Pro. Or even upgrade your key from old versions.
Check and post the results. If, for any reason, you did not solve, try doing the step 3 in Safe Mode anyway.
Try to delete (or copy&move) “extend.dat” file: http://forum.avast.com/index.php?topic=155.msg651#msg651
The extend.dat file is in a hidden folder, so if you’re Explorer to do the search, you need to explicitly enable searching of hidden/system files…
One thing I just thought of that might be the cause of this problem. I installed Acrobat, this then added ‘PDF Maker 10.0’ icons to the Outlook menu bar. It was after this the Avast icons disappeared.
Would this be a likely cause? I don’t know why it would be?
It looks like Outlook is trying to place the Avast icons but cannot. Look at 1. When Outlook loads, it has a space where I used to have the Avast icons. Then after a while the space disappears, look at 2.
I had the same problem in the beta version if you still have beta version you should update Avast Beta to Avast 6.0.1091.I already have Avast 6.0.1091 you can try this:
-Completely close Outlook
-Use search function of Windows to find all the files called “extend.dat”. Delete them
-Add/Remove Programs-Avast control panel and select Repair (restart your coumputer)