Computer won't power off

Check for incompatible drivers.

Return to tech that installed Mobo.

Go into your power settings and change it sounds to me like someone has changed it on you to shut down every hour.

When you plug in the 2nd hard drive as a single drive does the drive spin up and the computer goes through the Power on self test (POST)?
If you cannot hear the drive spin up and the computer doesn't boot up then most likely the hard drive is faulty.

sounds like that when you did a restore one of the files did not load correctly try using your repair disk and that should fix it

The presentation power scheme is used when you are giving a briefing using the PC as your slide show. So the presentation power scheme will never shut off the monitor or the hard drive, don't want it to shut down in the middle of a briefing.However, leaving it in that state for long periods of time may cause the CPU to overheat and shut itself down for protection. A better scheme for quick boot up would be Home/Office. Turn monitor off after 20 minutes and "never" for hard disk. This way it will save energy (therefore heat) and you will have a quick boot up. If you are using XP Pro, there is also an option to automatically put it in standby when you close the lid of your monitor. Hope this helps. If you have any questions let me know... Please rate this solution before logging off.

TRY PLUGGING IN EXTERNAL MONITOR, THIS IS IF YOU HAVE A LABTOP AND I THINK NOT.

HOW ABOUT REMOVING THE OLD DRIVE AND PUTING IT ON THE NEW COMPUTER AS 2ND DRIVER OR SLAVE DRIVE, SOME COMPUTER CABLES OFFER SELLECT CABLE THE C DRIVE WOULD BE 0 AND 2ND DRIVE WOULD BE 1, IF YOU DONT HAVE SELECT CABLE THAN EACH DRIVE HAS TO BE SET UP YOU WILL HAVE TO GO TO THE MFG WEB SITE LOOK UP JUMPER SETTINGS, THE FIRST DRIVE WILL BE THE MASTER AND THE SECOND ONE WILL BE THE SLAVE, NOW IF YOUR CD ROM IS ON WITH THE HD THAN YOU WILL HAVE TO HAVE 2ND CABLE FOR THE CDROM TOPUT ON THE 2ND SET OF PINS MARKED 2ND HD OPTION AND YOU HARD DRIVERS MASTER AND SLAVE GO ON
BANK 0 IF IT SAYS 0, IF IT SAY1 THAN PUT IT ON 1.

REBOOT AND THE COMPUTER WILL START AND PUT YOU INTO THE CMOS AND YOU WILL ADD THE HARD DRIVE BY GOING TO 2ND HD PUTTING CYCL, HDS, SECT, YES LBA
2ND CABLE YOU SELECT CD OR DVD
F10 AND YES
REBOOT
EVERYTHING SHOULD WORK FINE.

IF YOU DONT FILL CONFERTIBLE DOING THIS TYPE OF INSTALLATION THAN HAVE YOUR COMPUTER PROGRAMER FRIEND DO IT FOR YOU OR COMPUTER TECHN WILL WORK TOO.

ROD

i read an forum, mboar asus shutten dwon NOT avaible.

Check the USB port on your computer. It's very likely that the problem is there. On my computer USB ports stop working sometimes and the HD does exactly that. HOwever, when i restart the computer, everything works fine.

When you say "shuts down" do you get a BSOD (Blue Screen of Death) or does it just shut down without an error message? It definitely sounds like overheating. Try using a laptop cooler, something like this: http://www.overclockersclub.com/reviews/antec_notebook_cooler.php (I'm not saying you should buy that model necessarily, there are many such coolers). They can make a huge difference.