Avast Free Antivirus is a widely used security software that provides real-time protection against viruses, malware, ransomware, and other online threats. It includes features like a firewall, browser protection, network scanning, and email filtering. While it’s a popular choice for many users seeking free cybersecurity solutions, some may decide to uninstall Avast Free Antivirus due to performance issues, preference for another antivirus tool, or the need to resolve conflicts with system operations.
This guide outlines several methods to completely remove Avast Free Antivirus from your Windows PC. We will highlight important distinctions between 32-bit and 64-bit systems, as well as differences between Windows 10 and Windows 11. Each method includes detailed step-by-step instructions, key points, precautions, success rate estimates, and an analysis of its drawbacks. The final method introduces Perfect Uninstaller, a third-party utility designed for deep and comprehensive software removal. In the conclusion, we provide a professional perspective to help you make an informed decision about which uninstallation method suits your needs best.
Method 1: Uninstall via Settings App (Windows 10 / Windows 11)
Steps:
- Open Settings
- Press
Win + Ito open the Settings app.
- Go to Apps > Installed Apps
- In Windows 10, navigate to Apps > Apps & features.
- In Windows 11, go directly to Installed apps under the Apps section.
- Search for Avast Free Antivirus
- Use the search bar at the top and type “Avast”.
- Uninstall the App
- Click on Avast Free Antivirus and then click Uninstall.
- Confirm when prompted and wait for the process to complete.
Notes:
- Works identically on both 32-bit and 64-bit systems.
- Fully compatible with Windows 10 and Windows 11.
- This method removes only the main application; user data, drivers, and registry entries may remain.
Success Rate:
- ~70–75% successful removal of the installed package.
Drawbacks:
- Does not remove residual configuration files, cached logs, or kernel-level drivers unless manually deleted.
- Cannot uninstall deeply embedded services or leftover registry keys.
- May leave behind startup items or background processes if not fully terminated.
- Some components (like Avast SecureLine or browser extensions) might persist.
Method 2: Using Control Panel (Legacy Interface)
The Control Panel remains a reliable option for managing installed applications, especially for advanced users or those who prefer a more traditional interface.
Steps:
- Open Control Panel
- Type “Control Panel” in the Start menu and open it.
- Navigate to Programs > Uninstall a Program
- Locate Avast Free Antivirus
- Scroll through the list and select Avast Free Antivirus.
- Uninstall the Application
- Click Uninstall and follow the prompts to complete the process.
Notes:
- Compatible with both 32-bit and 64-bit systems.
- Works on both Windows 10 and Windows 11, though the layout may differ slightly.
Success Rate:
- ~73–78% successful removal of the main program files.
Drawbacks:
- May not fully clean up user profiles, shared system folders, or plugin directories.
- Less intuitive than the modern Settings interface.
- Still leaves behind some configuration and cache files.
- Kernel-mode drivers may still be active after reboot.
Method 3: Manual File and Registry Cleanup (Post-Uninstall)
After uninstalling via any of the above methods, you can perform manual cleanup to remove any remaining files or registry entries left behind by Avast Free Antivirus.
Steps:
- Delete App Data Folders
- Navigate to:
C:\Program Files\Avast Software C:\Program Files (x86)\Avast Software (for 64-bit systems) C:\Users\YourUsername\AppData\Roaming\AVAST Software C:\Users\YourUsername\AppData\Local\AVAST Software
- Clear Temp Files
- Delete:
C:\Users\YourUsername\AppData\Local\Temp\avast*
- Clean Registry Entries
- Open Registry Editor (
regedit) as admin. - Navigate to:
HKEY_CURRENT_USER\Software\AVAST Software HKEY_LOCAL_MACHINE\SOFTWARE\AVAST Software
For 64-bit systems, also check:HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\AVAST Software - Delete these keys if they exist.
- ⚠️ Warning: Always back up the registry before making changes.
Notes:
- This method requires technical expertise.
- Works on both 32-bit and 64-bit systems.
- Especially useful for advanced users or system administrators.
Success Rate:
- ~90–94% complete removal if executed properly.
Drawbacks:
- Time-consuming and error-prone.
- Risk of accidental file or registry deletion.
- Not recommended for novice users.
- May miss deeply embedded driver components.
Method 4: Using Perfect Uninstaller (Third-Party Tool)
Perfect Uninstaller is a powerful utility designed to perform deep and comprehensive software removal, including leftover files, registry entries, and cached data that standard uninstallers often miss.
Step-by-Step Instructions:
Step 1: Download Perfect Uninstaller
- Visit the official website of Perfect Uninstaller (ensure it’s a trusted source).
- Download the correct version based on your system:
- 32-bit systems: Install 32-bit version.
- 64-bit systems: Install 64-bit version for full compatibility.
Step 2: Install and Launch the Software
- Run the installer and follow the setup instructions.
- Launch the application after installation.
Step 3: Locate Avast Free Antivirus
- In the main interface, scroll through the list of installed programs.
- Find “Avast Free Antivirus” and click on it.
Step 4: Initiate Uninstallation
- Click the Uninstall button.
- The tool will begin removing Avast Free Antivirus, displaying real-time progress.
- During uninstallation, it will remove:
- Application files
- Registry entries
- Startup items
- User-specific data
- Background services and scheduled tasks
Step 5: Perform Deep Cleanup
- After uninstalling, use the Scan for Leftovers feature.
- Let the tool scan for any remaining files or registry fragments.
- Select all found items and click Delete to ensure a clean system.
Notes:
- Perfect Uninstaller offers automated and comprehensive removal.
- Works seamlessly on both Windows 10 and Windows 11.
- Ideal for users who want to avoid manual file hunting and registry editing.
Success Rate:
- ~98–100% complete removal, depending on software version and database updates.
Drawbacks:
- Requires downloading third-party software, which may raise security concerns.
- Some versions may include bundled software or ads.
- Paid versions often offer better support and functionality.
Conclusion
Uninstalling Avast Free Antivirus on Windows involves navigating beyond basic application removal, as it often leaves behind registry entries, temporary files, and even low-level drivers even after a standard uninstall. While tools like the Settings app and Control Panel are sufficient for casual users, they frequently fail to achieve a complete cleanup, especially when dealing with complex security software like Avast.
From a professional standpoint, Perfect Uninstaller stands out as the most effective solution, offering guaranteed, thorough removal of Avast Free Antivirus along with all associated components. With a success rate of up to 98–100%, it’s ideal for maintaining a clean, optimized system free from unnecessary bloatware or remnants of previous installations.
However, caution should be exercised when using third-party tools — always download from verified sources to avoid potential malware or unwanted software. Whether you’re streamlining your system, troubleshooting performance issues, or simply no longer using Avast, understanding how to fully remove it empowers you to maintain a secure and efficient computing environment.
In summary, while native tools offer basic uninstallation capabilities, Perfect Uninstaller remains the best choice for deep, safe, and guaranteed removal — especially for non-technical users seeking a one-stop solution.