Does it still boot into windows and you can't access "C" drive? I know some hardware changes can cause this but just changing a fan??? If so the links below may help. Note that you need to boot into safemode to access the security tab in xp home. http://support.microsoft.com/default.aspx?scid=kb;en-us;308421&Product=winxp http://www.techspot.com/vb/topic8914-pg1.html&pp=20
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