That's a complicated issue. There are several reasons why many people might still use Windows when other operating systems (such as Linux) are available:
Linux is free. Windows and Mac OS X are not
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Windows or Linux. Its a users option for this. Linux is free but Windows is more popular.
There is no such thing as "Linux XP". If you're referring to Windows XP, then the answer is no. As far as Linux distributions, for the majority of distributions, they are free (as in freedom) and free-of-charge.
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Both Windows and Linux hosting is powerful. If you use ASP or .NET then you should use Windows hosting platform. If you do not, then you can use the more affordable and more popular Linux hosting platform.
Linux operating system does
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MicroSoft Windows - Windows 8 : Linux - Ubuntu 14.04 are two examples. Note: Linux is the name of the kernel, while Ubuntu is a distribution (distro) and is one of many Operating Systems available to Linux users for free.
instead of windows you can have linux or mac. they are different, but you will know whats best for you when you try them, linux is free to download.but you need an operating system (windows, mac, linux or any other OS) for the computer to work
Linux The others are proprietary.
My advise would be to start with a flavor of Linux that closely resembles the Windows environment you're probably familiar with. I recommend Kubuntu Linux 4.01. It is widely available for download for free and you can choose it to run alongside Windows.