Error Code Portal
MicrosoftWindows Installer messagesError code

1609

MSI message 1609: An error occurred while applying security settings. [2] is not a valid user or group. This could be a problem…

Alternative forms: 0x00000649 · 0x649

What does this code mean?

Code 1609 · An issue reported by Windows Installer messages.

Official explanation · Original text

An error occurred while applying security settings. [2] is not a valid user or group. This could be a problem with the package, or a problem connecting to a domain controller on the network. Check your network connection and click Retry, or Cancel to end the install. Unable to locate the user's SID, system error [3]

Troubleshooting and diagnostic links

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

Source and terms of use

Windows Installer 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