WINDOWS 98 SYSTEM START-UP ERRORS

PC WILL START IN SAFE MODE COMMAND PROMPT ONLY. I GET (3) ERROR MESSAGES. (1)C:\WIN\HIMEM FILE CORRUPTED OR MISSING. SAME MESSAGES WITH DBLBUFF.SYS & IFSHLP.SYS. PLEASE HELP ME SAVE MY HARD DRIVE. IT HAS SOME CALL LOG MESS. IN FAXWORKS FROM A PASSEDAWAY RELATIVE. PLEASE!!! HELP ME GET IT GOING AGAIN OR I MAY NEVER BE FORGIVIN BY MY DAUGHTER. THANK YOU AGAIN.