Hello,
Yes my system date and time are correct. The fault occurs on Google Chrome Version 43.0.2357.134 the latest one, Firefox version 39 also the latest for browsers
Email clients:
Older outlook express and Sympatico.ca is the ISP, one of the largest in Canada and Thunderbird V 31.5.0 ... needs an update just recent that is used for only hotmail sites and they are all deemed to have incorrect certificates since this latest Avast update
Fair to say the email clients and browsers do not seem to be the issue here. If I do a system restore to your last version since I installed this only yesterday, I am confident all will work again. I am doing a system backup before I do any of that however clearly that is not the option I prefer.
Thank you in advance for any insight you might give us all.