the only reasons i know for a computer to shut itself off is because it overheats, or because it has had a fatal error in like windows or even the firmware like DOS whatever...

idn, try dropping all the settings to the lowest possible, turn off your Virus Checker and any other background tasks, absolutely everything, and see if it still crashes, if it does, run a thorough virus check and spy-ware check etc etc, try again, if it still screws up, try un-install and re-install

i have Crysis and Crysis: Warhead myself, i cant remember it ever causing the computer (a Dell XPS m1730 laptop) to shut down... the game crashed a few times sure... but never shut down the comp... if it still shuts the comp off maybe call EA technical support

Get software to monitor your CPU/Mobo and GPU.  If it's running in the 80+ you need a new one/better cooler.

I had an 8800GTX, great card, but ran really hot, same thing happened to me and it took me a while to check it out and the bugger burned out on me.  Now I have a GTX285 and a HUGE new CPU fan/sink and I don't have any problems.  Monitoring software is important.  Go to your manufacturers website to get some.

Thank you for the feedback. I read that I should also blast way down in the CPU heat sink, as dust can get there, too. I'm also planning to upgrade my fans and graphics card, so it should better.

Like thats going to help. I've heard EA has the worst support.

What??  Since when did EA get support??    

EA does have support, and you can call them anytime, for 2.50$/min you can get all the crappy support you want with your DRM!

At $2.50/min... Hmm..  They'd probably put me on hold for 4 hours.  

Let's not turn this into an EA rant thread.

Also, I have Crysis: Maximum Edition. I saw on the discs that they might be specially made for this edition, and not the regular discs put in a box.

EA

What graphics card are you using and what are your drivers?  I had problems with older drivers for the 8800gt.  Since I got a gtx 260 I have not had an issues with crysis. 

Check the event manager to see if it gives you more information.

Right click My Computer -> Manage -> System Tools -> Event Viewer

Check System and Application.

Dr.Gonzo

It's possible that you've mega-overclocked your processor and accidently fried one of its circuits (certainly possible with that extra dust).  I did that a few years ago with a cheap Compaq Presario I had - every time the CPU usage went above something like 80%, the whole system would die.

Wasn't EA just the publisher? They're not going to have any clue what the hell is wrong... unless it's something wrong with the media it came on-- or the installer maybe? Something on their end. Other than that, they just printed the discs, manuals and boxes as far as I know. If EA put the wrench time in on the game it wouldn't run at all, for anyone.

Dr.Gonzo

When this happened to a friend of mine's laptop, he would force it back on, and use it again, only to have it die 20 minutes later (despite my warnings). Eventually he fried his graphics chip (there was a TON of cat hair in the system), rendering the machine useless. Be sure to clean out your computer regularly and keep an eye on your heat.

System is at stock settings.

Here are my specs:

Intel Core i7-920
ATI Radeon HD 4850
3 GB DDR3 RAM
Windows Vista Home Premium 64 Bit

CPU usage hovers at around 5-6%, physical memory at 42%

That doesnt seem to show much

Edit: Vista might be a problem, since it asks more from a system in order to run programs. Hopefully Windows 7 will be better.