svchost.exe is a system file. Modify the firewall settings as described here:
open AVG user interface>double click firewall component>under firewall profile select "directly connected to internet".>click regenerate configuration>click save changes. Now go to tools>firewall settings>under profiles select Directly connected to internet>expand application>find the browsers like for example firefox>select the browser>under application action select "allow for all">click apply>now on the left pane select "Areas and Adapter profiles">mark the option "disable area detection and automatic firewall switch".>click apply and then OK. Now try to connect to net.