hello i have a problem with avast (2014.9.0.2009) after updating the icon is not active after a reboot why hello
Try a second reboot (although you may have already done that by now looking at the time of your post) as I often find that two reboots are needed to settle everything in.
Failing that run a repair.
Control Panel
Programs and Features
Avast
Left hand side - Repair and follow instructions
After it is finished reboot (maybe twice 
)
This should be on the beta board http://forum.avast.com/index.php?board=15.0