Think this might be the same thing others are experiencing in other threads but just encase please see logs.
This is what I keep getting multiple times seemly at random when I change or refresh page on chrome (havent tried on other browsers).
Avast! Websheild blocked a harmful webpage or file...
object: hxtp://sql3.true-secure.com/?id=982839&bro=CH
Infection: URL:MAL
Process: C:\Program Files\Google\Chrome\Application\chrome.exe