Many users who use Windows also use much additional Windows-based software, e.g. Microsoft Word and Internet Explorer. Opponents argue that Microsoft is too reluctant to share its Windows code with them and so they cannot develop high-quality software to run on the widely used Windows platform. Others argue that Microsoft has exploited its near-monopoly over the operating systems of personal computers by integrating new features into Windows as a way of deterring users from paying potential competitors for similar software, giving away tools such as an internet browser or audio and video player in order to drive other companies out of business. It is also accused of leaning on computer makers who preload software (including Windows) on to the PCs they sell, in an effort to prevent Microsoft's competitors gaining valuable access to the desktop in this way. In consequence, Microsoft is allegedly able to reap the benefits of an effective monopoly in many cases.