SAME PROBLEM OCCURED ,MY PC TOO.EVEN I INSTALLED THIS 5.03 VERSION TO 3 COMPUTERS (INSTALLED OS:XP SP2).THE SAME RESTARTING PROBLEM OCCURED AND GETTING BLUE SCREEN TO SHOW "FATAL ERROR" .I THINK THIS VERSION HAVING BUGS.SO,DO NOT INSTALLED THIS 5.03 VERSION UNTIL IT'S BUGGS HAS BEEN FIXES.SOME BODY SAYING THAT GO FOR XP SP3,BUT I THINK HE DON'T KNOW STILL XP SP3 HAVING BUGGS.