xP is probably the best Windows version there has been, but in my (unfortunately long) experience as a Windoze user ...... I'm afraid they very often do get viruses and Spyware etc. and the system is unreliable ....Why not? Everyone hates on Windows because they "think" always gets viruses and and are unreliable but it's not really true.
Viruses, Spyware, Malware, trojan's, system freezing and countless update downloads ...... I can do without thank you.
Mac's rule ... OK