Replying to Help! Laptop Problem

Alright I dont know why or how but as of right now my laptop will not boot windows.
I turn on my laptop, screen comes up asking if i want to start windows normally or if I want to run some fixing thing. So I try both. starting it normally brought me to the windows screen where its loading user accounts and shit, but not on the user account page. than it goes black and wont do anything. the fix it thing tries to run system restore but i have no previous dates set (stupid on my part, i know)

Im running Vista with 4 gigs of ram and a 250 gig HD with about 8 gigs left.
Anyone with any suggestions, please throw em out there. Im running in safe mode right now and it sucks balls.

So ya, help me please :)