Microsoft Works is not available as a free, legal download as of 2015. It has always been commercial software that must be purchased, either as standalone software or as a pre-installed software title on a new PC.
Microsoft Works is discontinued software that has not been available for purchase since 2009. Microsoft Office Starter Edition is its replacement in the low cost segment of the market, and the company recommends that users upgrade to a paid version of Office.
Microsoft does provide a free converter for Works files. This converter allows users to open Works files in Microsoft Office, and it is available as a download on Microsoft's website.