Error Code Portal
MicrosoftWindows Installer messagesError code

2401

MSI message 2401: 64-bit registry operation attempted on 32-bit operating system for key [2].

Alternative forms: 0x00000961 · 0x961

What does this code mean?

Code 2401 · An issue reported by Windows Installer messages.

Official explanation · Original text

64-bit registry operation attempted on 32-bit operating system for key [2].

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