Error Code Portal
MicrosoftWindows Installer return codesError code

1647

ERROR_UNKNOWN_PATCH

Alternative forms: 0x0000066F · 0x66F · ERROR_UNKNOWN_PATCH · 0x8007066F

What does this code mean?

Code 1647 · An issue reported by Windows Installer return codes.

Official explanation · Original text

The patch isn't applied to this product.

Troubleshooting and diagnostic links

First check that the document's product, version, and environment match your situation.

Source and terms of use

MsiExec.exe and InstMsi.exe error messages (for developers) ↗

Creator: Microsoft and MicrosoftDocs contributors
License: Creative Commons Attribution 4.0 International
Checked on: 2026-11-12

Modifications: Extracted numeric codes, symbolic names and English message text; converted Markdown/HTML to plain text and normalized whitespace; added Korean product context, namespace labels, status classification and separately labeled official links. No machine translation of message text.

Source details · Original licenses and notices