trojan horse

From: Adam M (anonymous_at_discussions.microsoft.com)
Date: 09/06/04 

Date: Mon, 6 Sep 2004 12:40:43 -0700

I need to erase everything on my comp. and reboot windows
xp. How? I have the trojan horse downloader.keenval.b and
its making my computer go very slow. So I think I am just
going to start over. Can anyone help?

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