QGIS releases new versions often. The version this tutorial is written for is
QGIS 2.2, which is no longer the current version. The SOS team recommends that
you download QGIS 2.2, which is available at http://www.qgis.org/downloads/.
Find the download link that works for your operating system.
Once you’ve clicked the link, the QGIS Setup Wizard should appear. Follow its
instructions to download QGIS 2.2. When you click
Finish, several icons should have appeared on your
desktop with a yellow Q on them. You want to click on the one called
QGIS Desktop to open the most sophisticated version of
QGIS. QGIS Browser is simply a less versatile version of QGIS Desktop. If these
icons do not appear, search for “QGIS Desktop” in the search bar in the
Start menu.