this book assumes that you're using one of the default python setups found at supported by this bookwindowsmac os xand linux working with windows the installation process on windows system follows the same procedure that you use for other application types the main difference is in finding the file you downloaded so that you can begin the installation process the following procedure should work fine on any windows systemwhether you use the -bit or the -bit version of python locate the downloaded copy of python on your system the name of this file variesbut normally it appears as pythonmsi for -bit systems and pythonamd msi for -bit systems the version number is embedded as part of the filename in this casethe filename refers to version which is the version used for this book double-click the installation file (you may see an open file security warning dialog box that asks whether you want to run this file click run if you see this dialog box pop up you see python setup dialog box similar to the one shown in figure - the exact dialog box you see depends on which version of the python installation program you download figure - the setup process begins by asking you who should have access to python