The error occures during boot and reads:
Diskette drive 0 seek failure
NOTICE - Hard Drive SELF MONITORING SYSTEM has reported that parameter has exceeded its normal operating range. Dell recommends that you backup your data regularly. A parameter may or may not indicate a potential hard.
Press F1 to continue, F2 to enter setup
Above is the error msg verbatim, the desktop is a Dell Inspiron 530s with better than 3\4 of the C:\ free and about half of the restore D:\ free. after the bootup completes the unit runs fine but gives another msg asking you to backup your data.