Some older video converter tools required separate codec installers. Nwcv4ssetup.exe has been observed in archives distributed on download portals like CNET Download.com or Softonic, often packaged with freeware converters from the mid-2010s.
If you have intentionally installed any of these products, the file may be: Nwcv4ssetup.exe
If you’ve determined the file is malicious, or you simply want it gone because you never installed NCH Software, follow these removal methods. Some older video converter tools required separate codec