After downloading and installing MuseScore, which you can do at www.musescore.org
, make sure there is an icon on your desktop. If there isn't, go to your home menu at the bottom left corner of the desktop, and search programs and files. When you find Musescore, right click and copy, then click and paste onto your desktop. Great! Now double click the icon on your desktop. The MuseScore 1.2 Logo box comes up, and then the default screen opens.