The majority of desktop operating systems are using Microsoft Windows 95-XP. This strong market share gives incredible muscle to third party software developers. As a result, there are a seemingly infinite number of third party programs for this platform. Having such a major advantage over the Mac systems almost guarantees compatibility when trying to communicate with other desktop users. Strength of the PC is in the processing unit. The units typically run an Intel or AMD processor with great clock speeds and high end performance. Intel has made a name for having the best processing unit of all time. Intel's power-house processors are great for the advanced Internet gamers and the multimedia powerhouse user.
The major downfall to having such a large market share is that there are people who wish to cause problems in the form of vandalism or violation of privacy. These people tend to write programs - referred to as viruses or "malware" - for Windows because it will cause the most harm and travel through the biggest group of users. Another major weakness of Windows is that the code is not very stable, when compared to other operating systems such as Linux or the Mac OSX system.
Overall, Windows' GUI is very straight-forward and relatively easy to use. My grandfather, who had never used a computer in his life, was able to pick up Windows XP and do essential Email and web surfing over the course of only a few months. The structure of Windows was very well thought out and is very easy to use for the common user. The