Error Code Portal
MicrosoftWindows Installer messagesError code

1705

MSI message 1705: A previous install for this product is in progress. You must undo the changes made by that install to…

Alternative forms: 0x000006A9 · 0x6A9

What does this code mean?

Code 1705 · An issue reported by Windows Installer messages.

Official explanation · Original text

A previous install for this product is in progress. You must undo the changes made by that install to continue. Do you want to undo those changes?

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