AVG Firewall is designed to protect your computer from unauthorized connections, hackers, and unsafe applications. It acts as a powerful security gatekeeper—but like any firewall software, it can sometimes become too strict or misconfigured. This can lead to common issues like apps being blocked, no internet access, or firewall settings not responding.
If you’re facing any of these problems, this 2025 guide walks you through how to identify and fix the most common AVG Firewall issues effectively.
1. AVG Firewall Blocking Internet Access
Issue: After enabling AVG Firewall, your internet suddenly stops working. This is often due to misconfigured network profiles or overly aggressive rules.
Fix:
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Open AVG Antivirus
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Go to Menu > Settings > Full Protection > Enhanced Firewall
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Click on Network Profiles
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Ensure your current network is set to Private (not Public)
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Restart your PC and check internet access again
If the problem persists, temporarily disable the firewall to confirm it’s the source, then reset settings to default (steps below).
2. Applications Not Connecting Online
Issue: Apps like Skype, Zoom, or games won’t connect to the internet even though your browser works fine. AVG might be blocking those specific programs.
Fix:
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Go to AVG > Menu > Settings > Full Protection > Enhanced Firewall
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Click on Application Rules
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Find the app in the list
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Set it to Allow all connections
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If not listed, click Add App, browse to the app’s .exe file, and allow it manually
Restart the app afterward to test the connection.
3. AVG Firewall Not Responding or Crashing
Issue: The firewall panel doesn’t open, or the entire AVG app crashes when trying to access firewall settings.
Fix:
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Restart your computer and try again
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If the issue persists, uninstall AVG using the AVG Clear Tool
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Reinstall the latest version from avg.com
Crashes are often fixed with a clean install and updated virus definitions.
4. AVG Firewall Blocking File Sharing or Printer
Issue: You can’t connect to shared drives or printers over a local network.
Fix:
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Go to Settings > Full Protection > Enhanced Firewall
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Under System Rules, enable:
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File and printer sharing
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Remote desktop (if needed)
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Make sure your network profile is set to Private
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Restart the network services or your PC
This allows trusted local connections without disabling the firewall entirely.
5. Firewall Keeps Reverting to Default Settings
Issue: Custom rules disappear after each reboot or update.
Fix:
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Ensure you’re running AVG as an administrator
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After modifying settings, click Apply and Save Configuration
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Avoid third-party “system cleaner” apps that erase AVG settings
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Keep AVG updated to prevent configuration bugs
This ensures your rules remain persistent across sessions.
6. Can’t Access Remote Desktop or VPN with AVG Firewall
Issue: VPN or RDP tools fail to connect with the firewall enabled.
Fix:
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Go to System Rules inside Enhanced Firewall settings
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Enable “Remote desktop” and “VPN support”
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Add your VPN app or IP address as an allowed rule under Application Rules or Packet Rules
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Try reconnecting
Some VPNs may require exceptions for specific ports—check with your VPN provider for details.
7. High CPU Usage Caused by AVG Firewall
Issue: AVG Firewall is consuming too much CPU or memory, slowing down your computer.
Fix:
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Update AVG to the latest version
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Open Task Manager and identify which AVG processes are heavy
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Run AVG Repair Tool:
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Go to Control Panel > Programs > AVG > Uninstall/Change > Repair
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Restart your PC
This should reset corrupted components causing the resource spike.
8. Can’t Change AVG Firewall Settings (Grayed Out)
Issue: Some settings are locked or grayed out, especially on shared or work devices.
Fix:
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Make sure you are signed in as a Windows administrator
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AVG might be controlled by Group Policy in work environments—contact your IT admin
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If personal device, try reinstalling AVG with admin rights and default settings
9. AVG Firewall Not Turning On
Issue: AVG says “Firewall is off,” and clicking the button doesn’t work.
Fix:
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Restart your PC
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Run AVG Repair (as above)
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If that fails, uninstall and reinstall using the AVG Clear Tool
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Make sure Windows Firewall is not conflicting—disable it if AVG Firewall is your main firewall
Conclusion
AVG Firewall is a powerful tool for keeping your system secure, but like any firewall, it needs fine-tuning from time to time. Whether you’re facing issues like blocked apps, dropped connections, or strange behavior, most problems can be solved by adjusting settings, reviewing app permissions, and ensuring your software is up to date. For persistent errors, don’t hesitate to use AVG’s built-in repair tools or reinstall the software completely. With the right configuration, you can enjoy strong protection without sacrificing functionality or speed.
