Microsoft has been hiding the file extensions in Windows by default, even though this is a security risk that is commonly abused by phishing e-mails and malware distributors.
Attackers will send phishing e-mails attached with malware and Windows hiding the actual file extensions does nobody any favors.
Windows default settings abused by attackers
To enable file extensions in Windows 10, please follow these steps:
- Search for ‘Folder Options‘ in the Windows 10 Start Menu and when ‘File Explorer Options‘ appears, click on it.
- When the File Explorer Options screen appears, click on the View tab and scroll through the Advanced settings until you see an option labeled “Hide extensions for known file types“. Be sure to un-check that box to ensure you have it disabled.
- Now press the Apply button followed by the OK button and the File Explorer Options screen will close.
Now all files displayed on the desktop, in folders, or in File Explorer will display a file extension.
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