Installing Odoo using the all-in-one package is very simple. After the package has finished downloading, double-click on the .exe file to begin the installation wizard.
The first screen will prompt you to select the language for your installation.
After you have selected the language and clicked on OK, the wizard will continue with the installation. From here, everything will continue like a normal Windows installation.
I highly recommend that you choose Custom install, so you can select the directory for installation. The default directory name contains the lengthy build number, making it rather difficult to work with in the command prompt.