I have post some massage according to this problem also.....
All my laptops in my college that using avast are currently took time to load the Local area network and wireless network connection....
I have told it before but seems someone just say he dont understand my english...
I solve this problem by uninstall my LAN and WIRELESS at Device manager...
After that it will be as usual as before...
But the problem coming back when i update my virus database.....
Hopefully this problem will be solve soon as many of my friend angry with me as im promote this antivirus to them...
Go go avast...