Trojan:Win32/Cerdigent.A!dha

It should have been repaired with definition update:

1.449.430.0

I am with Windows defender on:

1.449.508.0

Also have a look at:

https://www.notebookcheck.net/Microsoft-Defender-flags-DigiCert-certificates-as-malware.1291270.0.html

...

Microsoft moved quickly to push Defender detections to protect customers from malware signed with the compromised certificates. The detection logic it deployed was too broad. It caught the legitimate DigiCert root CAs alongside the revoked code-signing certificates, triggering quarantine actions on Windows systems that had done nothing wrong. "Earlier today we determined false positive alerts were mistakenly triggered and updated the alert logic," Microsoft told BleepingComputer. The fix shipped in Security Intelligence update 1.449.430.0. Systems that applied the update automatically had their certificates restored. Admins in environments with restricted update policies had to verify restoration manually using certutil -store AuthRoot | findstr -i "digicert".

....

Update your definitions/signature.

https://www.digicert.com/blog/microsoft-defender-incorrectly-flagged-digicert-root-certificates-as-malware

...

Microsoft has confirmed this was an error in their detection logic—not a compromise of DigiCert certificates. An updated Defender signature has already been released to resolve the issue

.....

Have a look at:

https://www.digicert.com/blog/microsoft-defender-incorrectly-flagged-digicert-root-certificates-as-malware

Thanks Gerard but I’m not sure what you mean by:-

Definitions / Signature

I’ve run a:-

Virus & threat protection updates

 - on May 8/26

 - and it tells me:-

Security intelligence is up to date.

 - but the item shown in the screen shot shown in my first posting still appears.

Thanks Gerard but how do I get rid of it?