My last known good configuration is missing or corrupt and I can't boot NT.

A. Windows stores a last known good configuration which is replacedwith the current configuration after a successful login.

If during boot the System hive is corrupt it will try to use the last knowngood, if this is also corrupt you will get the following error and NT will notbe able to boot:

Windows NT could not start because the following file is missing orcorrupt:
%systemroot%SYSTEM32CONFIGSYSTEMHardware Profile/Last Known Good menu

To resolve use one of the following:

Method 1

Use the emergency repair disk and choose the 'Inspect Registry Files' fromthe recovery menu. Choose 'Replace System Configuration' from the next menuscreen. This will replace the damaged Registry hive with the one on the ERDhowever if the ERD is out-of-date you will lose any changes.

Method 2

If you don't have a ERD or its to old, restore the registry from a tape thathas a backup of the registry (you would require a second parallel installationof NT).

Method 3

If you can't do either of the previous options the files that make up the ERDare stored on the local harddisk in %systemroot%Repair directory. You cantherefore manually expand this backup:

If it still fails uninstall NT and use Windows 98, you can play more games:-)