Run the installer as an administrator for the best experience.
Once the installer has been downloaded, locate it on your computer. Right-click the icon and select Run as Administrator.

Click Next to begin.

Click I Agree to accept the license agreement.

We recommend leaving the Check to run the BCS automatically checkbox ticked (admin users only — see non-admin installation below).
The benefits include automatic updates (you will always be asked permission before updating) and running silently in the background, so you won't need to start the BCS manually every time you want to run a test.

Specify the installation folder, then click Install.

The installation should complete successfully. Click Close to finish.

When the installer is run without admin privileges, the run automatically checkbox will be greyed out. In this case the default installation directory is the user's Desktop.
The installer will place a file named thebcs.exe on your Desktop. Double-click this file to start the BCS — a small dialog will appear confirming it is running in the background.