The device next to the yellow exclamation mark was not installed correctly, most likely.
Do not install the drivers in order presented. Install in this order
Video, BIOS, Chipset, SATA Drivers, Video Graphics, Network, System Utils, Audio, input devices, applications.
Check the date on the label cover of your hard drive... if over three years old, it may be defective. What is the brand: Samsung, Western Digital, Seagate, Maxtor, Hitachi ? if anything but Western Digital or Seagate, it is time to replace it.