problem with Conficker virus in Windows XP professionall.

[thaimic]

Hi all,

I have the problem with Conficker.Z.53 virus.
My computer always have to use LAN in my company.
Also I already format C drive and setup again operating system with windows xp professional sp2.
But My computer still infected by virus conficker Z.53.
so, if I update windows xp professional sp2 with service pack 3 by CD disk and not plug network cable in company whether my computer infect conficker virus or not.

So please help me.
Thank in advance.