system
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Do you have any other firewall software installed?
First, try a repair:
- Go to Control Panel>Programs.
- Select avast! Internet Security.
- Scroll down to where it says Repair. Select it and click next.
- Reboot.
If that doesn’t work try a clean install:
- Download the latest version of AIS here
- Download the avast! Uninstall Utility here
- Reboot your PC
- Uninstall avast! in Control Panel>Programs. Reboot.
- Start up in Safe mode. Run the uninstall utiity. Reboot.
- Reinstall avast.