I recently built my first computer and installed windows 7. When i installed it, it was fine. It asked me to reboot so i did. When i rebooted i can not get past the boot menus. It will then tell me start in safe mode, safe mode with networking or start with normal. If i click normal it will load up and the screen will turn black but my cursor shows. What do i do? Been having many problems for my first build.....