google chroome worked fine for ages but for the past 2 days it's said
"Google Chrome is having trouble accessing the network.

This may be because your firewall or antivirus software wrongly thinks that Google Chrome is an intruder on your computer and is blocking it from connecting to the Internet.
Here are some suggestions:
Add Google Chrome as a permitted programme in your firewall or antivirus software's settings. If it is already a permitted programme, try deleting it from the list of permitted programmes and adding it again."

My firewall is never turned on & google chrome is permitted program in my firewall anyway, so I tried opening my norton internet security but it won't open no matter how many times I click on it.

How can I get google chrome to work and open norton internet security?