WindowFix

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WindowFix

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WindowFix addresses a Windows-specific Minecraft issue where interacting with the title-bar system menu (right-click title bar, minimize, restore, etc.) may cause the game loop to hang or stutter.

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NeoForge
Fabric
Minecraft
26.2
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Available Platforms

CurseForge logo CurseForge Modrinth logo Modrinth

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About

Project Details

Type
Mod
License
GNU Affero General Public License v3.0 only
Latest Version
windowfix-neoforge-1.0.0+mc26.1.jar
Authors
CurseForge
Modrinth

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Modrinth ID

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About

Description

WindowFix

WindowFix addresses a Windows-specific Minecraft issue where interacting with the title-bar system menu (right-click title bar, minimize, restore, etc.) may cause the game loop to hang or stutter.

Environment

  • Windows client

Fix Modes

WindowFix provides two modes via client config:

  1. Block native system menu (stability-first)
    Blocks title-bar right-click system menu entirely to avoid entering the Win32 menu modal loop.

  2. Native compatibility mode
    Keeps native right-click system menu and enables MNS_MODELESS to reduce blocking likelihood.

Configuration

Config file is generated after first launch:

config/windowfix-client.toml

Example:

blockTitleBarSystemMenu = false
keepActiveDuringSystemMenu = true

Restart the game after changing config values.

  • blockTitleBarSystemMenu
    • true: Disable title-bar right-click native system menu.
    • false: Keep native system menu behavior.
  • keepActiveDuringSystemMenu
    • Only effective when blockTitleBarSystemMenu = false.
    • true: Suppress transient focus-loss messages during system menu operations to reduce brief hitching.
    • false: Keep default focus behavior.

Usage

  1. Put the built JAR into your client mods directory.
  2. Launch the game and adjust config/windowfix-client.toml as needed.

Log Keywords

Search these in latest.log:

  • Installed Win32 window hook for system menu freeze workaround.
  • Enabled MNS_MODELESS on system menu.

Known Limitations

  • Windows-only behavior.
  • In native compatibility mode, brief hitching may still happen depending on system window management behavior.

WindowFix

WindowFix addresses a Windows-specific Minecraft issue where interacting with the title-bar system menu (right-click title bar, minimize, restore, etc.) may cause the game loop to hang or stutter.

Environment

  • Windows client

Fix Modes

WindowFix provides two modes via client config:

  1. Block native system menu (stability-first)
    Blocks title-bar right-click system menu entirely to avoid entering the Win32 menu modal loop.

  2. Native compatibility mode
    Keeps native right-click system menu and enables MNS_MODELESS to reduce blocking likelihood.

Configuration

Config file is generated after first launch:

config/windowfix-client.toml

Example:

blockTitleBarSystemMenu = false
keepActiveDuringSystemMenu = true

Restart the game after changing config values.

  • blockTitleBarSystemMenu
    • true: Disable title-bar right-click native system menu.
    • false: Keep native system menu behavior.
    • keepActiveDuringSystemMenu
      • Only effective when blockTitleBarSystemMenu = false.
      • true: Suppress transient focus-loss messages during system menu operations to reduce brief hitching.
      • false: Keep default focus behavior.

Usage

  1. Put the built JAR into your client mods directory.
  2. Launch the game and adjust config/windowfix-client.toml as needed.

Log Keywords

Search these in latest.log:

  • Installed Win32 window hook for system menu freeze workaround.
  • Enabled MNS_MODELESS on system menu.

Known Limitations

  • Windows-only behavior.
  • In native compatibility mode, brief hitching may still happen depending on system window management behavior.

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