I have been using Vista and avast free which has been working flawlessly... However, I had to upgrade to win7 with the upgrade option so its not a clean install.
After upgrading, avast 377 was not shown in system tray... I uninstalled, restarted, reinstalled and the problem was continuing for a couple of days now.
I downloaded the new version which I thought would solve the problem but its still here... I reinstalled it for the 100th time but the problem is here. Its in love with 7 I would say.
Anyway, on each restart the tray icon is missing, but the services are all up and running (otherwise I wouldn't wait a week to report it
Also the UI became extremely...brief! The laconist spartans could have been jealous right now!! But I believe a picture of avast would give an idea of what I am talking about...