One of our best defenses against computer virus is to see if a file is executable or not, that means the extension is either .exe or .com. There may be others I am unaware of now.
As far as I can remember, Microsoft has always prevented Windows users from being able to distinguish an executable file, as by default the extensions are hidden!
The cure is simple, and I highly recommend it for any Windows user.
First find the ‘Control Panel’, and double click on ‘File Explorer Options’.
Ignore the “General” and “Search” panels, and select “View”.
In the lower panel, labeled “Advanced Settings”, the second item from the bottom is labeled “Hide extensions for known file types”. Make sure the check-box beside it is empty!
If there has been a change, the “Apply” button will be available. Click that, and then you can click “OK”. The job is done.
Your protection has now been increased. Make the most of it!