By A Web Design
Open a Browser window and enter http://www.google.com in the address bar and hit GO.
In the Google search window that opens search for moodle download as shown in Diagram 1.

Diagram 1
In the Search results window Click on the Moodle.org: Download standard packages as shown in Diagram 2.

Diagram 2
The Downloads tab of Moodle site opens in the Browser window as shown in Diagram 3. The download URL is http://download.moodle.org/

Diagram 3
Under "Current stable build" you will see two download link, one for .tgz and one for .zip.
When you click on the .zip icon, the download start page will be displayed as shown in diagram 4.

Diagram 4
A pop up window to SAVE the .zip file will be displayed as shown in diagram 5.

Diagram 5