How to recover from a corrupted registry

If your Windows XP computer won't boot because of corruption in the registry, you may get an error message that says XP can't start because a specified file is missing or corrupt, or you may get a Registry File Failure stop message (c0000218). You can use the recovery console to back up your registry files, delete the existing registry and use the repair folder files to boot into XP with a clean set of registry files. The process is described in KB article 307545 at:
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