This guide will demonstrate how to check whether your computer is running a 32-bit or 64-bit version of Windows and download the correct version of SQL Server 2014 Express. Click Here
Open the search bar at the bottom of the screen (next to the Start button) and type "32-bit." Select the option for "See if you have a 32-bit or 64-bit version of Windows."
Next to "System Type" the Settings window will display whether your computer is running a 32-bit or 64-bit version.
You will want to make note of whether your computer is a 32-bit or 64-bit operating system.
Next Click Here to open the web page where you can download SQL Server 2014 Express. Click the "Download" button and select the correct version of SQL Server 2014 for your operating system (32-bit or 64-bit.) Click the "Next" button to start downloading SQL Server 2014 Express.
To begin the installation, right-click the "SQLEXPR" file and select "Open." For SQL 2014 Express installation instructions click Here.