Opening NSI files
Did your computer fail to open a NSI file? We explain what NSI files are and recommend software that we know can open or convert your NSI files.
What is a NSI file?
Files with the .nsi extension are most commonly associated with the Symantec anti-virus software application. The NSI files contain shared files that are used by programs created by Symantec.
The .nsi file extension is also used for NSIS Nullsoft Scriptable Install System script files and NewsStand Reader files.
Software that will open, convert or fix NSI files
Try a universal file viewer
In addition to the products listed above, I would suggest that you try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and very likely yours too! Download Free File Viewer.