# 1.5.1 Microsoft Windows Installation

XTrackCAD is shipped as a self-installing self-expanding program (executable).

1. Using Windows Explorer, locate the directory in which you downloaded or copied your new version of XTrackCAD.

2. Start the installation program by double clicking on the xtrkcad-setup-4.2.3b.exe file icon.

3. Follow the steps in the installation program.

4. The installation lets you define the directory in which XTrackCAD is installed. The directory is created automatically if it doesn't already exist.

5. A program folder named `XTrkCad4` will be created during the installation process. The folder contains the program, documentation, parameter and example files.