Nullsoft Install System(NSIS) Nullsoft Installation System 是一个小巧高效的安装软件。可通过样例修改或根据自己要求编写 NSI 脚本文件来定制自己的安装系统，可实现许可协议的显示、安装类型的选择、写入注册表、写入INI文件、连接程序外壳、语句跳转、提示信息显示、创建卸载程序、定制安装和卸载程序的图标、创建快捷方式等其他安装程序应有的功能，是一款操作简单、功能强大的高效率安装软件精品。

NSIS (Nullsoft Scriptable Install System) is a small, efficient, capable, professional open source system to create Windows installers. It is designed to be as small and flexible as possible and is therefore very suitable for internet distribution.
Being a user's first experience with your product, a stable and reliable installer is an important component of succesful software. With NSIS you can create such installers that are capable of doing everything that is needed to setup your software.

NSIS is script-based and allows you to create the logic to handle even the most complex installation tasks. Many plug-ins and scripts are already available: you can create web installers, communicate with Windows and other software components, install or update shared components and more.