By default, all software supports multiple file extensions. Microsoft Security Essentials supports at least 1 different file extensions. The basic files that Microsoft Security Essentials supports are .TKO. However, not all of the extensions listed on the list are always used to save the effects of work in Microsoft Security Essentials. Very often, files with such extensions are used as source data files used by Microsoft Security Essentials.
Microsoft Security Essentials can be used to convert file formats between the file extensions listed below. You can open a file with one of the file extensions below via Microsoft Security Essentials and try to save it in another file format, also supported by Microsoft Security Essentials.