system
44
I had the exact same problem as you;the avast animation in the tray icon area all of a sudden stopped appearing upon startup. Turned out that the problem was that a worm interfered with the avast installation and stopped it from fully installing.
Run some scanners to pick up any infections. Run these free scanners:
- http://www.malwarebytes.org/ (run a full scan)
- http://www.surfright.nl/en/downloads (download hitmanpro and run a default scan; its very quick)