If there is a certain file extension that you do not want to have associated with Windows Media Player, follow the steps below. Microsoft's Media Player is a program that associates the files it is capable of opening. You can also click the Make default button to set Internet Explorer as the default Internet browser immediately. If you do not want Internet Explorer as the default browser, uncheck this option.
If you have installed Google Chrome and want it to be the default browser, follow the steps below.
If you have other media players installed, you may need to enable or disable their association with the file type you enabled or disabled in Apple QuickTime.