Sif extension is related to txtsetup.sif - WindowsNT setup file You can try to open sif files with Windows Setup.
During the Windows operating system installation if an error occurs, this file is used for restarting or installing. You can find detailed information about the process from the Windows support web page. In this case, please check the following link of microsoft.
What to use sif
which page related to sif file
sif Related Searches
You can check related links about sif fileextension.