Repairs to the registry might be needed if any of the following apply:

• One or more of the above-mentioned ePO registry keys are missing.
• The keys are present, but the values in the registry keys are missing.
• The entire ePO registry keys might need to be replaced.

NOTE: Previous versions of the Endpoint Product Removal (EPR) tool have been known to delete registry keys used by ePO. But, there are several other ways that registry keys or values could go missing because of causes outside of the EPR tool, or anything related to Trellix.

Option 1 - Restore from a backup.
If the above-mentioned registry keys are missing, it's conceivable that other keys could also be missing. Thus, the integrity of the ePO server can also be compromised. It might be necessary to restore the ePO server from a known good backup.

Related article: KB52126 - How to back up and restore the ePolicy Orchestrator database using SQL Server Management Studio.


Option 2 - Replace the missing keys.
If only the above-mentioned registry keys are missing, you can resolve the issue by exporting the registry keys from a known good ePO server. Then, import them on the problem server.

IMPORTANT: You must export the keys from an ePO server that has the same ePO version and build.