s.vb3k.com.crossdomain.xml

Avast popup for this is appearing occasionally in chrome; it seems most frequently when reading mail at comcast.net.The 4 requested logs are attached.

This appears to be a chrome/Comcast problem. The main solution so far appears to be to reset chrome. Back up your bookmarks first though

https://support.google.com/chrome/answer/3296214?hl=en-GB