This page will clearly explain the causes and the solution to resolve Avast antivirus not updating issue easily. Just follow the below instructions. for more....
https://antivirus-scan.co/avast-antivirus-not-updating

Avast helps to clean viruses from the pc easily. Sometimes users face Avast activation code error 305 while activation. Follow the steps below to fix....
https://antivirus-scan.co/avast-activation-code-error-305

If you want to skip a file from scanning, you can add it to the exception list. Follow the simple steps to add exception in....
https://antivirus-scan.co/add-exception-in-symantec-endpoint-protection

If you wish to uninstall Adaware antivirus on you computer, it’s an ease one. You need to follow is just follow the easy guidelines that....
https://antivirus-scan.co/adaware-antivirus-uninstall