system
8
I dont think the behaviour shield would interfere with the network.I would suspect the web or network shield more.
These shields by their very nature can slow browsing just slightly.
If i may make a suggestion.Have you removed the phantom devices from device manager notably in the plug and play section.
I was experiencing something similar on another program and i discovered phantom drivers were causing an issue.
Also i would suggest downloading and running the avast uninstall utility and then attempt another clean install.
But as is said before when i was having network issues it was old legacy network drivers from old programs which were the cause.
Thanks.