Install BUT only booting in safe mode

I am trying to get a system back to normal. I have been tinkering with it, and I think I messed it up. When I boot I have no start bar across the bottom, and it just locks up right after I click on the user name. {Win XP Home)The splash and all thatis fine, but when I go to acess a user it locks up, and no start up bar shows across the bottom.I go to safe mode, and I am able to get around just fine, But no internet access either. I wanted to just get rid of all the information on it, and reinstall a new OS thinking this would solve my problems.