When computer starts to boot the above message appears on screen & system shuts down.2 people need an answerI do too

Answer the following questions, and tell us what your STOP error message says.There are lots of STOP errors like that, so we need to know exactly what yours says.Here is an example:STOP: c000021a {Fatal System Error}The Windows Logon Process system terminated unexpectedly with a status of 0xc0000135 (0x00000000 0x00000000).The system has been shut down.Please provide additional information about your system:What is your system make and model? Home BuiltWhat is your XP Version and Service Pack? XP Media Center SP3?(latest)Describe your current antivirus and anti malware situation: McAfee, Symantec, Norton, Spybot, AVG, Avira!, MSE, Panda, Trend Micro, CA, Defender, ZoneAlarm, PC Tools, Comodo, etc. MSEssWas the issue preceded by a power interruption, aborted restart, or improper shutdown? (this includes plug pulling, power buttons, removing the battery, etc.)Rebooted during Windows updateDoes the afflicted system have a working CD/DVD drive? YesDo you have a genuine bootable XP installation CD (this is not the same as any Recovery CDs that came with your system)? YesFill in the blank: My system was working fine until: ____________________________________________.Do, or do not. There is no try.I decided to save up points for a new puppy instead of a pony!Sorry to hijack, but need help also. It appears that a parallel XP install is in order so that the registry can be edited. I would like to avoid that of course if at all possible. Thanks for your assistance!