Event ID - 18

Event Id18
SourceNT I/O
DescriptionNo Parameters subkey was found for user defined data. This is odd, and it also means no user configuration can be found.
Event InformationAccording to Microsoft:
Explanation :

A required subkey was deleted from the registry by an application or by someone using a registry editor.
User Action :
In the registry, add the Parameters subkey to the Serial subkey.
Caution: :Do not use a registry editor to edit the registry directly unless you have no alternative. The registry editors bypass the standard safeguards provided by administrative tools. These safeguards prevent you from entering conflicting settings or settings that are likely to degrade performance or damage your system. Editing the registry directly can have serious, unexpected consequences that can prevent the system from starting and require that you reinstall Windows 2000. To configure or customize Windows 2000, use the programs in Control Panel or Microsoft Management Console (MMC) whenever possible.
Reference LinksEvent id 18 from source NT I/O

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