Microsoft provides free product keys for the Express Editions of certain versions of its software products via its website. To obtain free Microsoft product keys online, users must download the product they want to use and then follow the on-screen instructions to create a Microsoft account and register the product.
Express Editions of Microsoft products are feature-limited versions of the full products. They allow the user to perform most basic functions, such as writing a simple Visual Basic or Visual C# application. However, they come with a limited selection of help files and lack the functionality to install certain extensions or develop applications for mobile devices.