Error it this ---> : You Need To Restart your Computer. Hold Down the power button for several secons or press the restart button!....
I can`t Use my MAC OS X

.... help me please
You've experienced a kernel panic. Visit
The XLab FAQs and read the FAQ on kernel panics for help troubleshooting the problem. If you do not find a solution, then repost your problem here, but this time please provide some additional information:
1. Type of hardware and hardware configuration (RAM, size of hard drive, peripherals, etc.
2. What you were doing at the time the panic occurred.
3. Has the problem persisted? If you restart the computer, what happens?
4. If you can startup, then please post the information from the panic log. Open your Console app (Utilities folder), click on Logs icon in the toolbar, look for panic.log in the left side list. Select the entry for the latest panic and post it here.
Any other pertinent information will help.