In Avast Antivirus, various program components contribute to the overall protection of your PC. Certain components are installed by default while others can be added during advanced installation. You can manually install or uninstall components at any time, however, we do not recommend uninstalling components unless necessary for troubleshooting purposes.
Add or remove program components
Manage individual program components in the Avast user interface:
- Open the Avast user interface and go to Settings ▸ Components.
- Follow the relevant step depending on whether you want to add or remove a component:
- To install a component:
Click the Install Component link next to the component that you want to add (for example, Anti-spam).
- To uninstall a component:
Click the downward facing arrow
next to the component that you want to remove (for example, Real Site), click Uninstall Component, then click OK to confirm the uninstallation. 
- To install a component:
- Restart your PC, if required.
Manage individual program components in the Avast Setup wizard:
- Log into Windows as an administrator and ensure no other programs are running.
- Access the Avast Setup wizard via your Control Panel.
- When the Avast Setup wizard appears, click Modify.
A list of recommended program components for your edition of Avast appears. - Select or deselect the components you want to add or remove, then click Change.
- When the update is complete, click Done and, if required, restart your PC.
- Avast Premier 17.x
- Avast Internet Security 17.x
- Avast Pro Antivirus 17.x
- Avast Free Antivirus 17.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
- Microsoft Windows Vista Home Basic / Home Premium / Business / Enterprise / Ultimate - Service Pack 2, 32 / 64-bit
- Microsoft Windows XP Home / Professional / Media Center Edition - Service Pack 3, 32-bit