windows security these files might be harmful

What's changed is that not the 'body' of the message refers to my Internet security settings, i.e. And since my PC scans clean, I'm assuming it's from Windows Security. It's either from Windows Security, or a good fake.

The subject text says 'Opening these files might be harmful to your computer'. What I call the 'subject' of the message has the orange shield with black exclamation point on an orange background. I just right-clicked on a file to double-check the message. Interestingly something I did (or maybe a Windows Update) has changed the message. Or at least it appears to be-the title bar says Windows Security. Sorry for delay, I got pulled away for different project & forgot about this until I resumed work on this project. (Not sure whether this s/b Security or Windows 7-feel free to move it if it's in the wrong forum.) But if I'm just copying files to/'from my network storage then I don't need the flipping warning.

If, because I lost my mind or maybe let my kids use my PC (which would be an indication that I'd lost my mind) I try to copy/run a file from outside my network, then I'd like to get the warning-so I don't want to disable it entirely. All the tips I've found so far involve disabling the warning entirely, for all files (or all files of a given type) and I don't want to do that. So, I'm open to either of two solutions-trust files on that network drive or disable the warnings for actions that don't involve running the files. These are files on my network drive which is not, AFAIK, accessible from outside my network (at least I can't access it except when I'm connected at home, or using a VPN client) so I'm pretty certain that these files are safe-and the warning isn't telling me that they're unsafe anyway, just that they're an 'unsafe type' i.e. Or copying them, or anything else that starts by right-clicking on them.

Windows security these files might be harmful