Installing Downloaded Packages

STEP Tools packages are distributed as ZIP files or Microsoft MSI installers. On most versions of Windows, you should be able to double click on the MSI file and the installer will launch.

If you have an older machine, it may not recognize the *.msi extension, or it may pop up a message that says "This installation package cannot be installed by the Windows Installer service". If either of these happen, install the upgrade below. Then your machine will be able to handle Windows MSI 2.0 packages.

The links below point to the Microsoft site. In case they decide to reorganize their download links, we have also provided a mirror of the update.

MSI 2.0 update		WinNT/2000		1.8mb		[microsoft.com] [local]
		Win9x/ME		1.7mb		[microsoft.com] [local]

Unpacking Zip Files

Some STEP Tools files are distributed in ZIP archives. As of Windows XP, ZIP support is built into the operating system. Older systems will need a separate unzip program.

Chances are, you already have an unzip program already on your system, but if not, you can get one at the following places or search for more options!

unzip		http://www.info-zip.org/		Free, all platforms, command-line or GUI versions, source code.
WinZip		http://www.winzip.com/		Commercial, Windows, evals available.
PKZIP		http://www.pkware.com/		Commercial, Windows, evals available.