Dear Suzanne Powell!
Welcome to the Microsoft Community!
Do you want to disable Copilot in the Office suite, Copilot in Edge, or the built-in Copilot application in Windows?
If it is Copilot in the Office suite, you need to subscribe to MS365. If you do not subscribe to MS365, you will not have this function.
Remove the Copilot preview icon from Edge
If it is in Edge, you need to find Edge's settings, then find the sidebar options, you should be able to find Copilot in the app and notification settings, and then you can turn off the "Show Copilot button on the toolbar" and "Allow Copilot to read contextual clues on the web" options.
If you do not need Copilot in Windows, you can disable it by following the steps below:
Remove the Copilot preview icon from the "Taskbar"
Press the Windows + I shortcut key on your keyboard to open Settings, and select Personalization > Taskbar.
Find and turn off the Copilot (Preview) switch.
In this way, the Copilot icon will not be displayed on the taskbar. After hiding the Copilot icon, the service will still run in the background. So you can still call out the Copilot panel directly through the Copilot shortcut key that comes with the new notebook.
If you want to disable it completely, please refer to the following 2 methods:
Use Group Policy to turn off Copilot
Users of Windows 11 Professional, Enterprise, or Education can completely turn off Copilot through Group Policy:
Use the Windows + R shortcut key to open the "Run" dialog box and execute gpedit.msc to open the Group Policy Editor.
Navigate to "User Configuration" > "Administrative Templates" > "Windows Components" > "Windows Copilot".
Double-click the "Turn off Windows Copilot" policy, select "Enabled", then click "OK" and close the Group Policy Editor.
Restart the system to apply the changes, or execute gpupdate /force in the "Command Prompt" to force a refresh of the group policy.
Turn off Copilot through the registry
You can also turn off the Windows 11 Copilot feature by editing the registry:
Use the Windows + R shortcut key to open the "Run" dialog box and execute regedit to open the Registry Editor.
HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows
Create a new registry "key" called WindowsCopilot.
Create a new DWORD (32-bit) value named TurnOffWindowsCopilot under the WindowsCopilot key and set its value to:
1 Turn off the Windows Copilot feature
0 Turn on the Windows Copilot feature
Click OK to save the changes and close the Registry Editor.
Restart the computer to apply the changes.
Disclaimer: Generally, modifying registry subkeys or work group is intended for advanced users, administrators, and IT Professionals. It can help fix some problems, however, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For further protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click How to back up and restore the registry in Windows - Microsoft Support to view the article.
I hope above information can help you. If you have any questions, please feel free to let me know. Tell me the results. I'm looking forward to hearing from you.
Thank you for your understanding and support!
I wish you all the best.
Best regards,
Yang.Z - MSFT | Microsoft Community Support Specialist