ERROR_DELETING_EXISTING_APPLICATIONDATA_STORE_FAILED - 15621 (0x3D05)
An error occurred while deleting the package's previously existing application data.
Updated: Feb 21, 2026
Technical Meaning
The error code ERROR_DELETING_EXISTING_APPLICATIONDATA_STORE_FAILED (15621, 0x3D05) indicates that an operation to delete the package's previously existing application data has failed. This error is specific to certain operations within Windows and can occur during package management or application installation processes.
Error Details
The error ERROR_DELETING_EXISTING_APPLICATIONDATA_STORE_FAILED suggests that there was a failure in attempting to remove files or directories associated with an application's previously installed state. This could be due to various reasons, such as file locks, insufficient permissions, or corrupted data structures.
Usage Context
This error is typically encountered during the uninstallation of applications or package management operations where existing application data needs to be cleaned up before proceeding with further actions. It can also occur in scenarios involving application updates that require cleaning up old files before installing new ones.
Developer Interpretation
Developers should interpret this error as a failure in the deletion process, which could impact subsequent operations such as installation or update processes. The error does not provide specific details about the cause but indicates that there was an issue with accessing or removing application data.
Related Errors
ERROR_FILE_NOT_FOUND(2, 0x2): Indicates that a file being deleted is missing.ERROR_ACCESS_DENIED(5, 0x5): Suggests insufficient permissions to delete the files or directories.ERROR_SHARING_VIOLATION(33, 0x21): Implies that the files are in use and cannot be deleted.
FAQ
Q: What does this error mean?
A: This error indicates a failure in deleting application data associated with an existing package. It could be due to various reasons such as file locks or insufficient permissions.
Q: How can I resolve this issue?
A: Ensure that all processes using the files are closed, and check for sufficient permissions before attempting the operation again.
Summary
The error ERROR_DELETING_EXISTING_APPLICATIONDATA_STORE_FAILED (15621, 0x3D05) is a specific error indicating a failure in deleting application data. Developers should be aware of this error when managing packages or applications and take appropriate steps to resolve the underlying issues.