Well Dell laptops (at least on mine) use a Broadcom software that has the ability to see who is using what.
I try to make sure that I am using a channel that either no one is using or if that can not be, I will use one that has a weak signal strength.
Signal strength did not move when Avast was turned off.
As I stated before it just seems strange that this occurred after I removed and the installed a security software.
I am getting a strong signal now.
So I will just see what happens later.