for me this started this past saturday. only then it didn't pop up the malware notice. it just wouldn't load the page. i disabled the shields and of course all was well. i've had avast installed for years and have been a member of that forum for some time while having avast installed.
today however, i guess maybe after an uninstall/reinstall, i finally get the malware popup.
still running smooth on my work computer.
and yes, avast is the only thing i have installed as far as AV software and they are all up to date