1

Access to several web sites is being blocked by Avast and pop-up indicates that the digital signature is invalid.
As these are national companies web sites and https, is this really likely?
How can I overcome this problem, other than by disabling Avast?
Thanks for any help offerred.

2

I had the same problem and found this cleared it up : open Avast, click Settings then choose Active Protection. Click customize on Web Shield. Now un-chech the box next to Enable HTTPS Scanning. That’s it. Happy webbing!

3

Hi, are you guys running Windows XP?

4

Thanks.
That did enable me to access the sites.
Seems the “wrong” way to resolve the problem though, however it will suffice.

Was using XP

5

Hey, Just wanted to let you know that I updated my program (still free) to 11.1.2241 today and went back in settings and re-enabled the HTTPS Scanning and all is well. The sights that were getting messages of invalid certificates before are now all coming up with no problems. I am also using XP sp3.

6

https scanning has changed in the latest version (2016).
Update (or do a clean installation) and the problem should be solved.