Windows error 0x80073D02 after auto-update? Here is how to fix it fast

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Windows MSIX app updates fail with error code 0x80073D02 when background helper processes prevent the final package registration step from completing. Unlike the main app processes, these helpers — such as bundled CLIs, Node.js servers, or Python processes — carry no package identity and are invisible under Task Manager's Processes tab, requiring the Details tab to locate them. Some apps also install an auto-starting packaged service, like Claude Desktop's CoworkVMService, which can restart mid-repair and cause the registration to fail again. The fix involves identifying and killing all leftover processes by executable path rather than name, stopping any associated service, and then manually re-registering the package using Add-AppxPackage against the existing AppxManifest.xml. This approach typically resolves the issue in minutes without requiring a full reinstall.

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