My laptop dell vostro 1015 is turning on but is not boot screen?

1.== when we on my computer it on not properly it stop on windows images and can not start ==

2. my operating system is windows 7 ultimate

3. 62bit ,4 gb ram

4. and sum time ago my computer go slow .it stop whan i work (hang)

5. he hated very much

6. his battery was damage == Heading text ==

this is my problem but my first one is important plz plz solve it

plz plz plz ........