Macbook Pro 2007

Hi
Can anyone help me with this, im getting error code 0x000000000000000
started with screen flickering rapidly and mouse pointer freezing. Has now progressed to the Mac not booting up, all i get is a booting apple symbol and spining circle which then freezes and a message that says you need to restart your computer. Any help appreciated

Which Mac and what version of OS X?

But briefly.... if you have an install disk, boot with it and run Disk Utility - verify and repair.

No startup disk (Lion, Mountain Lion, Mavericks) boot to recovery by using command + r keys and do the same.