Windows 2000 Pro won’t boot to Safe Mode

Windows 2000 Pro SP3 system will not boot fully into Safe Mode. It gets to the black Safe Mode screen, but just before displaying the Windows logon it reboots. My computer boots normally and I can boot to the Recovery Console. Any quick fix for this problem other than an in-place upgrade of the operating system?

It recently had a problem booting up at all, had to run chkdsk twice from the Recovery Console. The STOP error message then was 0x0000007A, KERNEL_DATA_INPAGE_ERROR. Running chkdsk seems to have fixed that problem, but did report “one or more unrecoverable problems”.