Windows XP is one of my favorite operating system. Mt era of operating systems started with windows XP itself. I had used it for 4 years.
And this is the best operating system of its time. After Windows 7 comes into the market. People use to shift from windows XP to Windows 7.
But still there are many companies which are working on Windows XP operating System. The best GUI of windows starts with Windows XP, After I launches Windows Vista. That was a complete failure into the market. Later only Windows 7 had replaced Windows XP.
Best part of Windows XP is it can also loads on 256MB of RAM and 80GB of hard disk. And gives you the best performance. I still remember in 2006 I was having the Pentium 4 System with Windows XP installed. And I started my computer carrier with this. Thanks to Microsoft for providing windows to us.