hp pavilion zv5000 wont start up?

HI I HAVE PROBLEM ON STARTUP IT FIRST GOES TO WINDOWS SCREEN AS NORMAL THEN HP SCREEN AGAIN AS NORMAL BUT THEN GOES TO BLACK SCREEN WITH LOTS OF WHITE WRITING WHICH STARTS WINDOWS DID NOT START SUCCESSFULLY.A RECENT HARDWARE OR SOFTWARE CHANGE MIGHT HAVE CAUSED THIS THEN GIVES ABOUT FIVE OPTIONS THREE WHICH ARE RELATED TO SAFE MODE,LAST KNOWN CONFIG AND START WINDOWS NORMALLY TRIED ALL OF THESE BUT THE SAME PROCESS HAPPENS EVERY TIME JUST REPEATS ITSELF AS TIMER COUNTS DOWN TO ZERO ANY HELP WOULD BE GRATEFULL THANKS.

DARREN
October 2008