Computer help forum: Computer is shutting off without notice.

Before I begin.. It's a fossil. I know it, but I can't afford another computer at the moment and it works for school. So with that cleared up and to avoid any complaints about that!

It's a Desktop, was built and sent to me but I will supply everything I can.

System:
-Microsoft Windows XP Professional
-Version 2002
-Service Pack 3

Computer:
-Intel(R)
-Pentium \9\(R) 4 CPU 2.66 GHz
-2.66 GHz. 0.99 GB of RAm

Local Disk
-NTFS
-37.2 GB

Graphics Card
-Intel(R) 82865G Graphics Controller
-Manufacturer-Intel Corporation

I looked to see if there were any errors..
There is one, as of the most recent shut off.. And a bunch of system notifications.

The error states,
"The following boot-start or system-start driver(s) failed to load:
i8042prt

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp."

Please note that these are posted UP from the error.. So happened after the error occurred.
The system notifications say that a bunch of things have entered a start control:
-The Network Location Awareness (NLA)
-The Network Location Awareness (NLA)
-The Application Layer Gateway Service
-The Application Layer Gateway Service
-The Terminal Services
-The Fast User Switching Compatibility
-The Fast User Switching Compatibility
-The IMAPI CD-Burning COM
-The SSDP Discovery Service
-The IMAPI CD-Burning COM Service
-The iPod Service service
-The SSDP Discovery Service service
-The iPod Service service
-The Telephony service entered the running state.
-The Remote Access Connection Manager service
-The Remote Access Connection Manager service
-The HTTP SSL service
-The HTTP SSL service

These ones entered a stopped state?
-The IMAPI CD-Burning COM Service service entered the stopped state.
-The Skype Updater service entered the stopped state.


I am running an antivirus now and will post what it says after I complete a full system scan.

Thanks for any help or ideas that may stop this from happening.