Windows Security is flagging converted files to .rar as a Trojan

Oh dear.

Windows security went through a phase of lots of false positives a couple of years ago. I hope it's not starting again.

Do you know how to add exclusions to Windows security?
Add or Remove Windows Defender Exclusions - TenForumsTutorials
- You can add an exclusion for the file type .rar but that does expose you to exploitation, as does every exclusion.
- I use the PowerShell given in that tutorial to backup my Exclusions and restore them to my other computers to save a bit of work. Admin permission is needed for both operations.

You can see all your Exclusions in
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions


All the best,
Denis