What are the system specs? It could potentially be incorrect or bad RAM. Could be a bad CPU or motherboard as well. I am just throwing out components that would cause an immediate shutdown.
CPU: AMD A4-5300 3.4GHz Dual-Core
MOTHERBOARD: ASRock FM2A75 Pro4 ATX FM2
RAM: GeIL Value PLUS 4GB (1 x 4GB) DDR3-1333
PSU: ATX 500W