I cannot access files on the PC, where the AVG Firewall is installed, from another PC in my local network

You need to enable Microsoft file sharing and printing in the system services. Please proceed as follows: 

• Open the AVG program.
• Choose the Firewall settings option from the Tools menu.
• Select Profiles -> your default profile (e.g. Standalone computer) -> System services.
• Choose the Microsoft file sharing and printing service.
• Switch the System rule details from Block to Allow for all.
• Confirm changes by clicking on the OK button.

If the PC is connected directly to the Internet, please restrict this rule to only safe networks. Such network should be created this way:

• Open the AVG program.
• Choose the Firewall settings option from the Tools menu.
• Select Profiles -> your default profile (e.g. Standalone computer) -> Defined networks.
• Click on the Add network button.
• Type a brief name of your new network (e.g. Local network).
• Tick in the Network is safe option.
• Click on the Add IP button.
• Please specify the network range and click on the OK button.
• Open the Microsoft file sharing and printing service again and switch the System rule details to Allow for safe.

Note: By default Microsoft file sharing and printing service is enabled only for safe networks in the Small home or office networks profile. When using this profile please create a new safe network using the steps above.

If you encounter any further issues with enabling of Microsoft file sharing and printing service, please contact our AVG Customer Services team.