I AM USING WIN98 PC. WHEN I START THE PC
THE MESSAGE BOOT DISK FAILURE, PLEASE INSERT SYSTEM DISK AND PRESS ENTER APPEAR. AFTER INSERT THE SYSTEM DISK MY PC STILL CANNOT RUN. SCANDISK AND CHKDSK DIT NOT FIND ANY PROBLEM IN MY HD.THERE ARE MANY IMPORTANT FILE IN MY PC. WHEN I CHECK DIRECTORY FILE IN C/: THERE IS NO WINDOWS AND OTHERS WORK FILES. I CHANGE MY HD TO ANOTHER PC AND ITS OK THE PC BOOT NORMALY AND ALL MY WORK FILES IS OK MY HD OK AND IN MY PC I PUT MY FRIEND HD THE SAME PROBLEM OCCURED I NEVER FACE THIS EXPERIENCE BEFORE WHICH ONE IS TRUE IS IT MOTHER BOARD PROBLEM, VIRUS ATTACKED, CMOS CORRUPT OR DATA CABLE PROBLEM.PLEASE ADVISE ME AND THANK YOU