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Sophos is on my Computer, and I don't know why.

Raina Tenalite

I was going on to a few websites that I normally go on every day for work. I never even had Sophos installed on my computer! It said, 

" An application is preventing Microsoft Edge from safely connecting to this site

"Sophos" wasn’t installed properly on your computer or the network:

  • Try uninstalling or turning off "Sophos"
  • Try connecting to another network

NET::ERR_CERT_AUTHORITY_INVALID"

Like I said, I have never installed Sophos on my computer. I have tried all of the articles that it showed to uninstall it on my computer, but it isn't even in my app list. What is happening, and how can I fix this?


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  • 0 in reply to Administrator User472

    If Sophos isn't on your local computer is it upstream of it, i.e. a XG firewall doing MITM on SSL/TLS?

    Looking at:
    ssl_error_assistant.asciipb - Chromium Code Search

    mitm_software {
    name: "Sophos",
    issuer_common_name_regex: "Sophos SSL CA_[A-Z0-9\-]+",
    issuer_organization_regex: "Sophos"
    }
    mitm_software {
    name: "Sophos",
    issuer_common_name_regex: "Sophos_CA_[A-Z0-9]+"
    }
    It would suggest the browser is flagging Sophos in the message because the issuer of a cert matches the above regex. 
    I would probably either review the certificates being loaded in the Developer tools of the browser.
    Maybe run Wireshark to see the certificates that are being exchanges to find one with a Sophos reference as per above.
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