Internet connection issues Windows Vists

Hello Steve,
We regret for the inconvenience caused. Please try to reinstall the AVG Network filter and check whether it resolves the issue.

- Disable AVG Self Protection
- Go to Control Panel -> Network Connections -> right click on the network area which is active -> "Properties"
A/
- If there is "AVG Network filter driver" uninstall it and restart the computer twice
- AVG Firewall initializes auto-repair function so "AVG Network filter driver" should be automatically installed (therefore two restarts are needed)

B/
- If there isn't "AVG Network filter driver" click "Install " -> "Service" -> "Have Disk" -> "Browse" and look for

c:\Program Files\AVG\AVG2015\Drivers\avgfwfd.inf

- Click "Open" button and follow the prompts
- Restart the computer twice

C/
- Enable AVG Self Protection back

Hello Steve,
We regret for the inconvenience caused. Please try to reinstall the AVG Network filter and check whether it resolves the issue.

- Disable AVG Self Protection
- Go to Control Panel -> Network Connections -> right click on the network area which is active -> "Properties"
A/
- If there is "AVG Network filter driver" uninstall it and restart the computer twice
- AVG Firewall initializes auto-repair function so "AVG Network filter driver" should be automatically installed (therefore two restarts are needed)

B/
- If there isn't "AVG Network filter driver" click "Install " -> "Service" -> "Have Disk" -> "Browse" and look for

c:\Program Files\AVG\AVG2015\Drivers\avgfwfd.inf

- Click "Open" button and follow the prompts
- Restart the computer twice

C/
- Enable AVG Self Protection back

This past weekend, my wife installed our recently licensed copy of AVG on her laptop, which runs  Windows  Vista and was unable to connect to the Internet via our WiFi router. She can connect using her cell phones mobile hot spot. It's not the router. We uninstalled AVG  and this did not solve the problem. We've checked our firewall settings to see if changing thins would help and have not found a solution. Any ideas how to fix this?