Hey, I got a couple blue screen's of death, and one red screen, also alot of white screen's of death. How do I fix my comp?? Whats wrong with it anyway, please help!! 

My Computer
System One
-
- Motherboard
- Asus P5Q3 Deluxe 3.00 ghz
- Memory
- 4 GB
- Graphics card(s)
- ATI Radeon HD 4870x2
- Sound Card
- Asus Xonar D2/PM 7.1
- Monitor(s) Displays
- 2443BW 24 inc 5ms
- Screen Resolution
- 1920x1200
- Hard Drives
- Western Digital 150GB 10KRPM 16MB
- Case
- cooler master stacker 830
- Cooling
- 7 fans
- Mouse
- Logitech Mx revolution
- Keyboard
- logitech G15