popular file extensions

List of some types of files that are potentially dangerous on Windows
not only does a new .exe file contain security risks for windows computers, but many other file extensions also carry hidden dangers.
What is file extension?
some file systems place name extensions as a feature of that system. the name of a system may be restricted to the length and format of the extension. in other cases, file name extensions or file extensions are considered part of the file name without too much distinction.