File Extension SIF

File type: Windows NT Setup File

About the SIF file type:

If Windows cannot find the appropriate program associated with .SIF files, then your registry may have errors. Check your Windows registry for errors (includes file association errors).

The .SIF extension identifies a data file used during the installation of Windows NT. As such Windows NT will access these files automatically and so there should be no need to access them manually.

Additional Information:
The .SIF file extension also identifies ISIF Format Vector data files and certain data files for Autodesk's range of CAD (computer-aided design) software.