Turn on PC by keyboard

[kavi24]

Help!
My Computer starts by just pressing spacebar on my keyboard.
Can anyone tell me how to stop that?
My 2 year old son had found out that and turn it on when he want to play with my PC.
Please help me to stop him to do that.

Thanks

[GX1_Man]

How about a computer make and model number to work with?

[Fed]

bios setting

[GX1_Man]

Is it turning on from OFF or from standby or hibernate? Is this a laptop?

[kavi24]

It is a Pentium 4 and Desktop computer.

[kavi24]

GX1_Man
I don't understand your question so much. But I am trying to explain the problem once again.
my computer turn on after I shut down completly.
If  you by mistake press on my spacebar on my keyboard then it turn on.
It is a Desktop PC.

[soybean]

As an earlier post mentioned, have you checked your BIOS options to see whether the BIOS has a setting that controls this behavior?

[kavi24]

What is BIOS option? How can I find that?

[vibhor_agarwalin]

When your computer starts to boot press the "del" button.

Just see what pops up.

[vibhor_agarwalin]

BIOS stands for Basic Input Output System

[soybean]

What is BIOS option? How can I find that?

Many computer owners have probably never seen this part of their computer system.  It's something you normally do not need to see.  Access to it must be achieved during startup, before Windows loads.  As a previous post said, the Del key may be the key to access the BIOS for your system.  However, this varies from one make/model to another.  On some computers, the F1 or F2 key is the key to access the BIOS.  Here's an informative source on How to Access/Enter Motherboard BIOS

You may need to repeatedly tab the key during startup to catch the system at the right time.