I just checked my Windows Event Logs, and noticed that under the Application log, I have a number of Event IDs 454 and 517 with source ESENT and Task Category Logging/Recovery. These are apparently related to DllHost (4748) and Cortana.

Early on, after first installing Windows 10, I followed some instructions to disable Cortana as much as possible because it is not something I'm currently interested in. So I expect that I could safely ignore these, but I'd prefer to resolve them in the proper way.

Event ID 454 states:
"DllHost (4748) Microsoft.Windows.Cortana_cw5n1h2txyewy_NOEDP_LEGACY_IDB: Database recovery/restore failed with unexpected error -551."

Event ID 517 states:
"DllHost (4748) Microsoft.Windows.Cortana_cw5n1h2txyewy_NOEDP_LEGACY_IDB: Database recovery failed with error -551 because it encountered references to a database, 'C:\Users\mike_\AppData\Local\Packages\Microsoft.Windows.Cortana_cw5n1h2txyewy\AppData\Indexed DB\IndexedDB.edb', which does not match the current set of logs. The database engine will not permit recovery to complete for this instance until the mismatching database is re-instated. If the database is truly no longer available or no longer required, procedures for recovering from this error are available in the Microsoft Knowledge Base or by following the "more information" link at the bottom of this message."

According to that last sentence under 517, "... procedures for recovering from this error are available in the Microsoft Knowledge Base or by following the 'more information' link at the bottom of this message."

However, a brief on line search of Microsoft Knowledge Base did not reveal any obvious instructions for dealing with this. And the only link at the bottom of the message was for, "More Information: Event Log Online Help". Clicking that took me some advertising for Surface on XBox.

So I thought I'd ask here

Thanks for any info.