Event ID - 20

Event Id20
SourceWindows Update Agent
DescriptionInstallation Failure: Windows failed to install the following update with error <error code>: <update>.
Event InformationAccording to Microsoft:
This problem occurs when Windows Automatic Updates tries to start the storage engine to update the Extensible Storage Engine (ESE) database. When Windows Automatic Updates tries to start the storage engine, the storage engine encounters a problem in the transaction logs that belong to the database. When Windows Automatic Updates tries to download updates on a Microsoft Windows Server 2003-based or Microsoft Windows XP-based computer, an access violation error may occur in the Esent.dll file.
Reference LinksWhen Windows Automatic Updates tries to download updates on a Windows Server 2003-based or Windows XP-based computer, an access violation error may occur

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