To turn off Delivery Optimization on Windows 11, follow these steps:

  1. Using the Settings app:

    • Press "Windows+i" to open the Settings app.
    • Navigate to "Windows Update" under the left-hand pane.
    • Click "Advanced options" at the bottom of the page.
    • Scroll down to the "Additional Options" group and click "Delivery Optimization."
    • Toggle the switch next to "Allow downloads from other PCs" to the "Off" position.
  2. Using the Windows Registry (advanced users only):

    • Open the Windows Registry Editor by typing "regedit" in the search bar and selecting the Registry Editor app.
    • Navigate to this path:
    • Find and double-click the "Start" key.
    • In the Edit DWORD window that appears, change the Value Data to "4" and then click "OK."
    • Restart your computer to enable the changes.

Please note that the Windows Registry is a powerful tool and misuse can render your system inoperable. Only use the registry if you know what you're doing. If you can't disable Delivery Optimization, it might be due to your device being managed by an organization, in which case you should contact your system administrator for details.