The Avast Setup wizard allows you to modify Avast Antivirus by installing or uninstalling individual components.
Access the Avast Setup wizard
- Right-click the Windows
Start button and select Apps and Features from the menu that appears. 
- Ensure Apps & features is selected in the left panel, then click your version of Avast Antivirus, and select Modify.
- Press the
WinXkey simultaneously, then select Programs and Features from the menu that appears.
- Right-click your version of Avast Antivirus, then select Change from the drop-down menu.
- Click the Windows
Start button and select Control Panel. 
- Follow the relevant instruction according to your view setup:
- Default category view: Under Programs, click Uninstall a program.
- Large/small icons view: Click Programs and Features.
- Default category view: Under Programs, click Uninstall a program.
- Right-click your version of Avast Antivirus, then select Change from the drop-down menu.
- If prompted for permission by the User Account Control dialog, click Yes.
- When the Avast Setup wizard appears, the following options are available:
- Change the default location where your modified version of Avast Antivirus will be installed.
- Use the drop-down menu to select components according to Custom protection, Recommended protection, or Minimal protection. If you choose Custom protection, manually select or deselect components.
- Click Change to confirm.
- Click Yes to authorize the change.
- Click Restart computer.
- Avast Premium Security 20.x
- Avast Free Antivirus 20.x
- Avast Omni 1.x
- Microsoft Windows 10 Home / Pro / Enterprise / Education - 32 / 64-bit
- Microsoft Windows 8.1 / Pro / Enterprise - 32 / 64-bit
- Microsoft Windows 8 / Pro / Enterprise - 32 / 64-bit
- Microsoft Windows 7 Home Basic / Home Premium / Professional / Enterprise / Ultimate - Service Pack 1, 32 / 64-bit