Win11DisableRoundedCorners is a lightweight Windows customization utility designed to remove the rounded window corners introduced in Windows 11 and restore a sharper visual appearance similar to earlier Windows releases. The tool works by cold-patching the Desktop Window Manager library (uDWM.dll) to alter how window borders are rendered at the system level. Unlike theme-based modifications, it directly changes DWM behavior, allowing consistent square corners across most application windows. The project was created for users who prefer a more classic or compact desktop interface and want deeper control over Windows aesthetics. It includes restoration functionality so users can revert changes if needed, and it automatically backs up the original system file before patching. The software is intentionally minimal, focusing on a single system-level tweak while remaining relatively easy to use for advanced Windows customization enthusiasts.

Features

  • System-level disabling of rounded window corners
  • Cold patching of the Desktop Window Manager
  • Automatic backup of original uDWM.dll files
  • Restore functionality for reverting changes
  • Minimal lightweight executable design
  • Compatibility with supported Windows 11 builds

Project Samples

Win11DisableOrRestoreRoundedCorners Screenshot 1

Project Activity

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Categories

System

License

GNU General Public License version 3.0 (GPLv3)

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Additional Project Details

Operating Systems

Windows

Programming Language

C

Related Categories

C System Software

Registered

2026-05-06
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