Thanks Eddy. Never doubted Avast ;). Will stop fretting.

Fault report says the faulting module is MSVCR110.dll, Module Version: 11.0.51106.1. That dll’s properties say it’s to do with Msoft Visual Studio 2012, so befuddles me why it has suddenly started glitching with avast’s webrep in google searches, but I’ve learnt not to expect to understand… :-[