Well I do miss it now but was the BEST and most STABLE version of windows and was so smooth and easy to use. The operating system was released to manufacturing on August 24, 2001, and generally released for retail sale on October 25, 2001 by Microsoft. Even now it was widely used for its compatibility with other softwares. Time period of installation is around 40 mins and it depends upon system resources.
Windows Xp has a builtin firewall and provides a decent protection to your pc. This is a much usere friendly O/S.