Please help Boot up problems

I was getting a blue screen with the following error:
0x0000007B (0xF7911640, 0XC0000034, 0X00000000, 0X00000000).
I tried booting up in safe mode but no luck. I have just installed a new M. Board ASRock Model AMD K7S41GX, New DDR RAM 512Mb and using a processor which was on a different M Board Gigabyte Model A-7ZXE. Please can you help?????

I have replaced the HDD with a new one with OS installed on it but when windows nearly comes up, pc reboots its self automaticaly. any idea y this is happening pls????