http://nsis.sourceforge.net/Download
http://prdownloads.sourceforge.net/nsis/nsis-2.21-setup.exe?download
NSIS (Nullsoft Scriptable Install System) is a 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.
File Release Notes and Changelog
Release Name: 2.21
Notes:
NSIS 2.21 is released. This release features support for Windows Vista, faster
lzma compression, new macros for easy Windows version comparisons and includes
the usual collection of new features, bug fixes, improvements and translation
updates.
Changes:
Major Changes
* Added WinVer.nsh for easy Windows version comparisons
* Upgraded to lzma sdk 4.43 for faster compression
Minor Changes
* Added Vista support to GetWindowsVersion
* Added x64.nsh including a few simple macros for handling x64
installations
* Fixed a handle leak in Locate
* Minor documentation updates and fixes
* Modern UI 1.76: Added MUI_ABORTWARNING_CANCEL_DEFAULT (RFE #1547844)
New/Changed Commands
* Added RequestExecutionLevel (RFE #1524709)
Translations
* Added Valencian translation (patch #1558822)
* Bulgarian corrections
* Slovenian corrections
Build System
* SCons requirement upgraded to 0.96.92
