MacBook Pro will not turn on
This morning, on going to use my MacBook Pro, I pressed the power button and watched it load up to the white Apple on the grey background, saw the progress wheel spinning and watched it continue to do this for an extended period of time.
Puzzled, I held down the power button (as I have been doing to resolve my freezing problem), turned it off and started it up again.
This time, every time it turns on, it spins the progress wheel (about 5 minutes on the grey screen) and shuts itself down with no warning.
I am completely unable to use my MacBook Pro and am writing this on an almost equally problematic Windows system - but this kind of thing is expected of Vista.
MacBook Pro 2.6GHz, Mac OS X (10.5.4), 4GB RAM