Windows Defender started falsely claiming CV has a virus yesterday. I complained to Microsoft. They have analyzed the program and put it on the safe list. But, I don't know how often the safe list is updated on PCs. If you have a problem, here is their response:

cvbj4a.zip

Submission ID: c3e5d61c-980e-471b-a0cc-3650a226ddcd
Status: In progress
Submitted by: [email protected]
Submitted: Apr 8, 2020 9:11:03 AM
User Opinion: Incorrect detection
Analyst comments:
We have removed the detection. Please follow the steps below to clear cached detection and obtain the latest malware definitions.
1. Open command prompt as administrator and change directory to c:\Program Files\Windows Defender
2. Run “MpCmdRun.exe -removedefinitions -dynamicsignatures”
3. Run "MpCmdRun.exe -SignatureUpdate"

Alternatively, the latest definition is available for download here: https://www.microsoft.com/en-us/wdsi/definitions

Thank you for contacting Microsoft.

Or, you can just un-quarantine the file.