Windows 2000 registry comprises a handful of hive files located in the
%systemroot%\System32\Config folder. When Windows 2000 starts, it builds the
registry from these files. One of the registry files is the SYSTEM hive, and a
corrupted or fragmented SYSTEM hive can prevent the system from booting.
the system first boots, it’s limited to 16 MB of memory. A highly fragmented
SYSTEM hive can cause the maximum amount of memory to be exceeded, thereby
preventing the system from booting. Defragmenting the
file can be a quick fix. You can defragment the
system drive inside of Windows 2000, which is a good reason to do it on a
regular basis; but if your system has sufficient contiguous free space, you can
overcome the problem through the Recovery Console (RC).
- Boot the system to the RC and
then use the CD command to change to the
- Rename the existing SYSTEM
file to SYSTEM.OLD.
- Use the command COPY
SYSTEM.OLD SYSTEM to create a new, unfragmented
copy of the SYSTEM hive.
- Exit the RC to restart the
creating an unfragmented copy of the SYSTEM hive
doesn’t fix the problem, it’s possible that the SYSTEM hive file is corrupted.
If you have a good version backed up in the %systemroot%\Repair or %systemroot%\Repair\Regback
folder, boot to the RC again and then copy the backup SYSTEM hive file
to the %systemroot%\System32\Config folder.
As always, we’ll remind you that editing the registry can be risky, so be sure
you have a verified backup before making any changes.
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