INSTALLING SQL 2000 PERSONAL EDITION

WHEN CLICK NEXT ON THE SCREEN THAT IS ASKING FOR THE COMPUTER NAME I GET A MESSAGE WHICH SAYS ‘A PREVIOUS PROGRAM INSTALLATION CREATED PENDING FILE OPERATIONS ON THE INSTALLATION MACHINE. YOU MUST RESTART THE COMPUTER BEFORE RUNNING SETUP.’ I STILL GET THE MESSAGE EVEN AFTER RESTARTING THE COMPUTER. WHAT COULD BE WRONG HERE?