It's possible to ask Windows to hide common filename extensions. Remember also that a filename's extension is not always visible.

Opening or double-clicking either of these types of files can have undesired consequences. This includes lists of files to be copied, and even Windows Registry entries to be added, changed or deleted. INF, contain information describing how a program or driver should be installed. REG files contain information that is automatically copied to your Windows Registry Installation information files, those with names ending in. Other types of files, while not exactly programs, can cause damage if opened or double-clicked. WSF - A file containing scripts, data and other information in the XML (extensible Markup Language). Open or run this file, and its associated script file (.VBS. WSH - A text file that contains settings used when running a particular script. JSE - A JavaScript or Jscript (.JS) file that has been encoded to prevent you and I from seeing its true contents. VBS, except the program stored in the file is written in the JavaScript or Jscript programming language. But they discovered this file format is only recognized by Windows 2000, and older versions of Windows that have been specially upgraded to Windows Scripting Host v2.0. The authors of the Love Bug virus originally intended to distribute their program as a. VBE - A VBScript (.VBS) file that has been encoded to prevent you and I from seeing its true contents. They are 32-bit Windows programs, and can do anything an EXE program can. VBS - A text file containing a program written in the VBScript language. Open or run a PIF file, and its associated.

It provides information about a DOS program, such as how much memory it needs, how it accesses the screen, etc.

BAT files, but only run under Windows NT and Windows 2000. These commands can launch other programs, rename and delete files, and perform other potentially destructive acts. BAT - These text files contain lists of DOS commands. But they can be just as destructive as a malicious EXE file. COM - This type of file can only contain 16-bit DOS programs. It can contain 16- or 32-bit Windows programs or DOS programs. EXE - This is the most common type of program file. Here's a list of filename extensions to watch out for: But exactly what constitutes a 'program' may not be totally clear to you. You should never run a program that you download or receive in an e-mail without virus checking it. Problematic Program Extensions Program Extensions

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