Error Code Portal
MicrosoftWindows Win32Error code

1635

ERROR_PATCH_PACKAGE_OPEN_FAILED

Alternative forms: 0x00000663 · 0x663 · ERROR_PATCH_PACKAGE_OPEN_FAILED · 0x80070663

What does this code mean?

Code 1635 · An issue reported by Windows Win32.

Official explanation · Original text

This update package could not be opened. Verify that the update package exists and that you can access it, or contact the application vendor to verify that this is a valid Windows Installer update package.

Troubleshooting and diagnostic links

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

Source and terms of use

System Error Codes (1300-1699) (WinError.h) ↗

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