i am using windows 10. how do i disable copilot?

Well now, that's very interesting. I don't have a subscription so it makes me think that Microsoft is trying to force it by making it impossible to remove a very unpopular feature. Let me add that I am not surprised.

WINDOWS 10

TO DISABLE IN EDGE

Open Edge Browser and open its Settings by clicking on the 3 dots in the upper right hand corner.

From the menu on the left, select Sidebar.

Scroll down to App and notification settings. Under App specific settings, select Copilot by clicking on it.   Turn off the button beside Show Copilot, everything below should become greyed out.

TO DISABLE FOR WINDOWS, CREATE A BATCH FILE CONTAINING THE FOLLOWING AND RUN AS AN ADMINISTRATOR.  THIS WILL CREATE A KEY FOR COPILOT AND DISABLE COPILOT.  THIS IS LESS RISKY THAN EDITING THE REGISTRY AND CREATING THE KEYS YOURSELF.

--> if you need help creating a batch file, check this out - How to Write a Batch File: 10 Steps (with Pictures) - wikiHow

reg add "HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\WindowsCopilot" /f /v "TurnOffWindowsCopilot" /t REG_DWORD /d 1

reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsCopilot" /f /v "TurnOffWindowsCopilot" /t REG_DWORD /d 1

REBOOT COMPUTER.

Please mark as helpful.

Chrome is spyware masquerading as a browser.

We're stuck between two evils.

After execution, logoff and log back on to see that CoPilot has been removed.

How do you know it's been removed ... because you can't see it?

For Windows 10 disable of CoPilot, create a batch file with the following commands and then execute it in an elevated command prompt:

reg add "HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\WindowsCopilot" /f /v "TurnOffWindowsCopilot" /t REG_DWORD /d 1

reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsCopilot" /f /v "TurnOffWindowsCopilot" /t REG_DWORD /d 1

After execution, logoff and log back on to see that CoPilot has been removed.