About Win11 Toggle Rounded Corners
A simple utility to disable rounded window corners on Windows 11
Win11 Toggle Rounded Corners 1.4
A simple utility to disable rounded window corners on Windows 11
- By Rich Ayr
- Open Source
- Portable
- Updated Jul 26, 2026
What's new in 1.4
Fixes the logon task on multi-user PCs and laptops.
New
- The installer asks whether the logon task should apply to every administrator on the PC
or only to the account running setup.
Fixed
- The logon task only ran for the account that installed it. Anyone else signing in got
rounded corners back with nothing to explain why. It now covers every administrator on
the PC. (thanks @bughit for reporting!)
- Laptops signing in on battery skipped the task entirely, because it was inheriting the
schtasks default that blocks tasks on battery power.
Standard accounts still aren't covered: the patch needs administrator rights, and a
scheduled task can't elevate a standard account.
Full Changelog: v1.3...v1.4
Technical details
| Publisher | Rich Ayr |
|---|---|
| Version | 1.4 |
| Release date | 2026-07-26 |
| License | MIT |
| Installer type | portable, inno |
| Architecture | x64 |
| Package ID | rich-ayr.win11-toggle-rounded-corners |
| Requirements | Windows 11 or later |
| Admin rights | Required |
| Install scope | All users |
Install Win11 Toggle Rounded Corners from the command line
- Install with Windows Package Manager
winget install --id=rich-ayr.win11-toggle-rounded-corners -e- Update to the latest version
winget upgrade --id=rich-ayr.win11-toggle-rounded-corners -e- Uninstall
winget uninstall --id=rich-ayr.win11-toggle-rounded-corners -e- Silent install with the offline installer
"win11-toggle-rounded-corners-setup.exe" /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-
Win11 Toggle Rounded Corners version history
1.3 Jul 25, 2026
Adds automatic elevation, a smaller-corners option, and a modernized codebase.
New
- The tool now requests administrator rights on launch, so starting it from Explorer, a
shortcut or the installer brings up the standard UAC prompt instead of failing with
"make sure you are running as admin". Note that every invocation now needs elevation,
including --help.
- --small option for a subtler alternative to fully square corners (thanks @amnweb!)
Changed
- Failures now say what actually went wrong. Where v1.2 printed status: 0x5, you now get
Access is denied. (0x5), with the Windows error text alongside the code.
- The installer now tells you when the "run automatically on logon" scheduled task could
not be created, instead of leaving it silently missing.
Removed
- The --no-patching fallback. It pulled in Zydis (a full x86 disassembler) just
for this one option, inflating the binary for a niche feature with worse visual
results than the primary .rdata patching method, which has been the default
all along and is now the only option. If you'd rather keep using it, v1.2 still
has it. Normal usage (--disable/--enable/--small) is unaffected.
Under the hood
- Modernized the codebase to C++23/26.
- Opens dwm.exe with just the memory read/write access the patch needs, rather than
requesting full access to the process.
- Every Win32 handle is now owned by an RAII guard instead of being closed by hand on each …
Frequently asked questions
Is Win11 Toggle Rounded Corners free?
Yes. Win11 Toggle Rounded Corners is free and open-source software released under the MIT license.
What is the latest version of Win11 Toggle Rounded Corners?
The latest version is 1.4, released on Jul 26, 2026.
Is it safe to download Win11 Toggle Rounded Corners?
The download button links to the official installer published on github.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with 8492c63675e17a928fb40793566da0977eae9f5722e365f30f5683d5ca4b1eaf.
Which Windows versions does Win11 Toggle Rounded Corners support?
Win11 Toggle Rounded Corners requires Windows 11 or later and is available for 64-bit (x64) systems.
How do I install Win11 Toggle Rounded Corners silently?
Run the offline installer with "win11-toggle-rounded-corners-setup.exe" /VERYSILENT /SUPPRESSMSGBOXES /NORESTART /SP-, or install it with Windows Package Manager: winget install --id=rich-ayr.win11-toggle-rounded-corners -e --silent.
How do I uninstall Win11 Toggle Rounded Corners?
Open Settings › Apps › Installed apps, find Win11 Toggle Rounded Corners and select Uninstall. From the command line, run winget uninstall --id=rich-ayr.win11-toggle-rounded-corners -e.
Is there a portable version of Win11 Toggle Rounded Corners?
Yes. Win11 Toggle Rounded Corners is available as a portable program (win11-toggle-rounded-corners.exe, 64-bit (x64)) that runs without installation. Copy it to any folder or USB drive and run it from there.
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