Could you provide us with more details of the current configuration you are using to have a better understanding of the setup you have?
If possible, please remove non-essential hardware components that might be preventing the unit to fully load your Operating System. I also noticed you mentioned that it would hang or shut down. Would the system turn back on? Would you need to press the power button to turn it on?
You may want to consider running our Intel® Platform Confidence Test (PCT) Utility to test your system board.