XP Starts by itelf after being put in Hibernation?!?

Microsoft Windows XP

Let me explain my problem. I put my computer into Hibernation and go to bed.
When I wake up or check late at night I find my PC on. It has turned on by
itself.?.

Is there some way to fix this problem.

System info:

Compaq Presario 6000
Windows XP Home SP2
Intel Pentium 4
1.5 GB Ram

Help!?!
Look in the BIOS for Wake-on-lan, Wake-on-Modem, Wake-on-Ring, etc.

Disable these in the Power Management section of the motherboard's BIOS.

BIOS is an acronym for basic input/output system.

See your computer manual.

Also...
Accessing Motherboard BIOS
http://www.michaelstevenstech.com/bios_manufacturer.htm
To add to what mv10201 posted.

Open the Device Manager...
Start | Run | Type: devmgmt.msc | Click OK |
Click on [+] Network adapters.
Double click your Adapter.
Click the Advanced tab.
Set these to Disabled:
WakeUp on ARP/PING
WakeUp on Link Change
WakeUp using APM Mode

These properties are device dependent, so you may have different WakeUp or
Wake items listed.

Click the Power Management tab.
Uncheck these:
* Allow this device to bring the computer out of standby
* Only allow management stations to bring the computer out of standby

Allow this device to bring the computer out of standby
[[Specifies the operating system to come out of a low power state to service
the event that occurs. For example, an incoming modem call will alert the
system to service the call even if it is in hibernation.
If this option does not work, it might be because your hardware does not
support this capability. Contact your hardware manufacturer for more
information.]]

Only allow management stations to bring the computer out of standby
[[Specifies the computer to come out of a low power state only when the
device receives certain types of network traffic, which are typically sent
by a network administrator. When you select this check box, the only network
traffic that causes the device to bring the operating system out of a low
power state is traffic sent by a network administrator. Clear the check box
to allow all network traffic to cause the device to bring the computer out
of a low power state. As a rule, if the computer provides services to other
computers, you should clear the check box so that other computers can bring
it out of a low power state.]]

[[You can use the power management settings to specify that the operating
system come out of a low-power state to service an event. For example, an
incoming modem call will alert the system to service the call even if the
system is in hibernation. You can also specify whether the operating system
should turn off a particular device if it is not doing something, such as
servicing a call.

The Power Management tab only appears for device drivers that support the
power management standards, such as network adapters.]]
That did the trick I hope. I won't know until I put my PC in Hibernation and
leave it alone for a period of time.

Thanks again Wesley.
Keep having fun.