If you have the AVAST antivirus software installed on your computer and receive the following messages:
Open AVAST antivirus and go to Security > Web shield and click the stop button. You can select how long you want to have it disabled (it should only be for 10 minutes). If you use it all the time, then it would be better to disable the software permanently. IS&T recommends installing and using the Sophos Antivirus software.