If you’re done with Duet Night Abyss or need a clean slate for troubleshooting, removing it on Windows is straightforward. The built‑in uninstaller handles the job for most people; if that fails, you can start the uninstaller directly from the install folder and optionally sweep up leftovers.

Uninstall Duet Night Abyss from Windows Settings

  • Quit the game and close its launcher.
  • Press the Windows key, open Settings.
  • Go to Apps > Installed apps (or Apps & features on older builds).
  • Search for Duet Night Abyss.
  • Select it, choose Uninstall, and confirm.

That’s the standard and recommended route. Windows removes the application and its registered components, and you can stop here unless you’re chasing a stubborn issue or freeing every last megabyte.

Uninstall when the Settings entry is missing or fails

If the app doesn’t appear in Settings, or the uninstall process won’t start, launch the uninstaller directly from the game’s folder.

  • Open File Explorer and navigate to the install directory. It’s often in C:\Program Files (x86)\Duet Night Abyss.
  • Double‑click Uninstall.exe and follow the prompts.

When the uninstaller completes, refresh File Explorer. If the folder remains and contains only leftover files, you can delete the folder manually.

Optional: remove leftover files

The uninstaller is designed to remove the program directory. If a Duet Night Abyss folder remains in the original install location after uninstalling (and it contains no files you need), delete it to reclaim disk space.

Tip: Empty the Recycle Bin afterward to actually free the space.

Advanced (optional): clean up registry entries

This step is not required for normal use and should be done only if you’re comfortable with the Windows Registry. Deleting the wrong key can affect system stability. Create a restore point first.

  • Press Win + R, type regedit, and press Enter.
  • Check for the following keys and delete them if they still exist after uninstalling:
Registry path What it is
HKEY_CURRENT_USER\Software\Hero Games\Duet Night Abyss Per‑user settings for the game
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall\Duet Night Abyss_is1 Uninstall entry registered with Windows
HKEY_CLASSES_ROOT\Local Settings\Software\Microsoft\Windows\Shell\MuiCache\...em-win64-shipping.exe System UI text cache referencing the game executable
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\FirewallRules\...(em-win64-shipping.exe) Windows Firewall rules created on first run
Note: The exact MUI cache and Firewall rule entries can vary by drive letter and install path. If you don’t immediately see them, don’t hunt aggressively—leaving benign cache entries in place is safe.

Reinstall after uninstall (if you’re fixing issues)

If you removed the game to resolve errors and plan to come back, restart your PC after uninstalling to release file locks and refresh services. Then download the current installer from the official site and install to a drive with ample free space:

If the launcher offers a file repair option before you reinstall, running that can sometimes save you a full download. Otherwise, a fresh install on a drive with plenty of headroom is the cleanest path.

For most players, removing Duet Night Abyss through Windows Settings is all it takes. Keep the manual uninstaller and registry cleanup in your back pocket for edge cases—useful when entries are missing or you need to be absolutely thorough.