Windows error 15607 (ERROR_INSTALL_DEREGISTRATION

Status / error code:		Category:

Constant name:
Source:	Operating System:
Description: The app package could not be unregistered.

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ERROR_INSTALL_REGISTRATION_FAILURE	ERROR_INSTALL_CANCEL

ERROR_INSTALL_DEREGISTRATION_FAILURE

ERROR_INSTALL_DEREGISTRATION_FAILURE means Windows could not remove an app package registration in the requested user or deployment context.

First identify whether the package is in use, belongs to another user profile, or has a related package dependency before forcing any removal action.

Retrieve the Activity ID log and note the specific package full name and user context involved.
Use Get-AppxPackage to inspect which users and package types still have the package installed.
Close applications using the package before attempting a supported removal or servicing operation.

Get-AppxPackage -AllUsers | Select-Object Name, PackageFullName, PackageUserInformation