Internet stopprd working

I have a laptop running Windows 10.
After downloading and installing AVG Free, the internet stopped working. either on Wi-Fi or with Lan cable.
 I uninstalled Avg and internet working fine. Why and what can I do for an antivirus?

Hello Hilton,

I am sorry to hear that. I would request you to reinstall AVG Free using an offline installer https://www.avg.com/en-us/download.prd-gsr-free and check if you are able to access the Internet. If you still face any issues, please contact us to proceed further.