Some background first. My computer is about 2 1/2 years old and I don't know the exact specs, it is PLENTY powerful. My son turned the power off INSTEAD of shutting it down the correct way. He told me he has done this many times with no issues.
Now I don't know if this the cause of the problem or not but I cannot get Windows XP to load.

When the computer starts to boot, the first page loads quickly so it is difficult to see all the info. The next page comes up and has this info on it: REALTEK RTL8139 (X) /8130/810 X BOOT AGENT Press shift F10 to configure
Then the Windows XP logo comes up or tries to load, goes blank and the whole process starts all over again in a continuous cycle.
Now I have tried pressing F8 and got to that screen. There are error messages listed and I have tried every option from SAFE mode to last known good configuration. It will always end going BACK to same process I just stated.
If anyone has any ideas, please let me know. Thank You
if you have win xp cd available, you can try using the repair. It has helped other people in similar situations but for more detailed help, ask a malware SPECIALIST like broni or patio or evilfantasy and they will get the the more detailed specs of getting your problem solved.When you see REALTEK RTL8139 (X) /8130/810 X BOOT AGENT screen, press Shift+F10 to enter BIOS.
Make sure, that the boot order reads: floppy, CD, HD
Disable Boot from Network (wording is different on every machine, may say Integrated NIC, Network, PXE-xxxxxxx), if it's enabled.
Save changes on exit.

Make sure, your son doesn't press power button to turn computer off. Sooner, or later it'll cause damages.