Windows XP won't finish loading

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From: lennymay (lennymay_at_discussions.microsoft.com)
Date: 07/13/04 

Date: Tue, 13 Jul 2004 16:43:02 -0700

Windows Xp won't load in any mode, just gets to the splash screen and stalls. Then asks if I want normal mode, safe mode , with networking and one other choice. No matter what I choose it starts to load gets to the slash screen where the little green dots are going across the screen, stalls and starts over . I have no idea why this is happening. We have not installed anything new or downloaded anything.
Please help.