WinEdt is a powerful and versatile text editor for Windows, with a strong predisposition towards the creation of Latex documents. do not, however, mistake WinEdt itself for a Tex system! You'll have to download and install a (free) Tex system for Windows (Miktex, or Tex Live). The Downloads page of this site has more information on WinEdt, Tex and links to other programs needed to make Tex operational on the Windows platform.