Windows xp only working in safe mode?

Hello,
Recently my computer had 2gs of ram put into it. Then the computer wads accidentally unplugged while power on. I plugged the cp back in and turned it on. It came to the log in screen showign only the owner account. (normally i dont have to login to my cp.) i clicked owner to log in and it said logging in. Then immediately it goes to loggin off. So i rebooting my cp ran a restore of 5 days ago. Still after the ram was put in. It still came to the same screen. So i loaded my cp into safe mode. It lets me in buti have limited access to eveyrthing. Does anybody know how i can fix my problem? im currently on my cp and in safe mode. please help