If you are using two antivirus products in your system and having difficulty in removing malware and viruses then the reason behind it is that two any virus cannot work simultaneously. You need to remove one antivirus. The reason behind AVG antivirus and Windows firewall is same, you need to disable Windows firewall if you want to install AVG antivirus. And if you are using any other antivirus or AVG older version then also you need to remove them. To know how you can do it, please dial 0808-101-2159 AVG Help Number UK, this is a toll free number to provide you tech support.