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I have now Googled this issue came across a Kasperski Lab Forum. It seems from 2014 to present date its a common problem. Kasperski's advice is to uncheck "Scan encrypted connections" However, other users have commented that this then brings up a warning that the computer is at risk, plus it disables SafeMoney - one of the key features of Kasperski!!!
It appears it is related to certificates of websites stored in some kind of cache being possibly out of date. It is not the main websites certificate that is likely to be the cause, but a third party advertisers certificate.
There is advice on how to update certificates, but the problem remains for many. The odd thing is that it happens on some users PCs but not everyone's even with the same settings selected, and in the same house, using same router, same browser and so on.
The last person to post simply suggested keep clicking "Discontinue" when the initial warning comes on.
Bottom line appears to me to be switch from Kasperski when its time to renew. Any suggestions?