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ERROR_UNKNOWN_PRODUCT
ERROR_UNKNOWN_PRODUCT means that an MSI API call or command was made for a ProductCode that is not registered as installed in the relevant installation context. It can occur when an uninstall or maintenance command uses the wrong product identity.
What to check
- Verify the ProductCode belongs to the exact product and version that is present on the device.
- Check per-user versus per-machine installation context when the command is run by a management agent or another account.
- Do not substitute a display name for a ProductCode in an MSI command line.
Microsoft: Windows Installer error codes · Microsoft: Installer function reference
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