Blocking JavaScript can stop some Windows malware
Email attachments are probably the most common mechanism for infecting a Windows computer. As potential victims get wise to the tried and true infection schemes, bad guys have a relatively new wrinkle - the attached malicious file is JavaScript. JavaScript, or more correctly in this case, JScript files, are plain text files that end in ".js".
JavaScript files are normally found in web pages where your web browser interprets the instructions and executes them. By and large, JavaScript inside a web page is safe as the browser limits the fish bowl where it lives to a single web page.
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