windows xp help

[sumo]

I have windows xp on my desktop and recently got it wipped clean and put stuff back on it but now i have to register windows xp and i don't have the serial number, i phoned up and they saiid I had a naughty version, Help.

[Hou]

is it a naughty version?

who put it on/supplied you with a copy?

also read your pms