Configure avast! Antivirus Web Shield Proxy

Starting with version 4.6, avast! antivirus comes with a new "on-access" scanner that re-directs all HTTP Internet traffic through a local antivirus filter. This Web Shield "transparent proxy" can interfere with downloading MLS program and/or data updates over the Internet. If there is a problem updating CTI Navigator on a computer running avast, the OnAccess Protection should either be temporarily paused/disabled, or its proxy setting removed from the Windows Internet Options.

To turn off the avast! Web Shield, right-click on the avast! "a" icon in the Windows system tray > select OnAccess Protection Control > select pause, disable, or terminate.

To remove the avast! OnAccess Protection proxy server setting in Windows:

1. Go to Start > Control Panel > Internet Options > Connections tab
2. Select the appropriate Internet Service as follows:
   1. If using a Dial-up Internet service, click Settings button;
   2. If using a broadband (non-dialup) Internet service (such as DSL or cable), click LAN Settings button
3. Clear/Un-check all boxes under Automatic Configuration
4. Clear/Un-check the box under Proxy Server
5. Click OK.

It may be possible (see avast! Web Shield Issues link below) to permanently configure the avast! Web Shield to allow CTI Navigator and its update manager functions to run over the Internet as follows:

1. Right-click on Start > select Explore
2. Progressively select C > Program Files > AL WIL Software > Avast > Data
3. Double-click on the file avast4.ini   {it should open in Notepad}
4. Find the [WebScanner] section
5. In this [WebScanner] section type OptinProcess=CTI Navigator.exe, CTIUpdateManager.exe   {be sure to include a comma between the file names}
6. Close Notepad and save the changes
7. Restart the Web Shield provider - terminate and then start again.

Otherwise, home (non-commercial) users should consult the avast! Technical Support website (see related articles #3 and #4 below) or email support@avast.com for assistance in configuring avast! to not interfere with your MLS program (CTI Navigator). CTI Navigator uses the Internet standard (HTTP over port 80) to transfer MLS information over the Internet. If you decide to uninstall avast!, you may need to use their uninstall utility (see related articles #5 below).