Our school get annoying worm which cause slow internet connection and make it dificult to access major anti virus website. Finally we found out the name :

Worm.Conficker [PCTools]
W32.Downadup [Symantec]
Net-Worm.Win32.Kido.ih [Kaspersky Lab]
W32/Conficker.worm [McAfee]
W32/Confick-A [Sophos]
Worm:Win32/Conficker.A [Microsoft]
Worm.Win32.Conficker [Ikarus]

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