My Acer aspire 5733z-4633 laptop will not always boot. It starts and once it hits the acer screen it will shut off and it keeps restarting unless i take out the battery. Even without the battery and just the wire it does this. Also safe mode, f2 and f12 do not work it still crashes and restarts. But it doesnt always do this. It seems that when I shut down normally it doesnt give me this problem but if i just close it, idk when ill get it to start again. I hear it may be a hard drive problem, but that if it is, i would nver be able to get this to start with all my stuff still the same, so is there something i can do before shutting it off again to maybe fix this problem? help is greatly appreciated.