>>4
Windows XP is fast(only 6 services enabled with ~30MB working set for the entire OS), stable, user-friendly and can run almost anything. Sound quality is superb, all video codecs work flawlessly, drivers never crash or introduce artifacts, amount of configuration required for optimal functioning is vastly lower than any lunix. There is no implied "configure it yourself" mentality, it works out of the box. Configuring is optional, easy and user-friendly. Even changing registry is much easier than editing config files, due excellent documentation by microsoft.
Now tell me why should i use lunix? I don't pay for software anyway(winxp is easily pirated) and i don't need to have the sources.