You can delete a User Account in Windows 11/10 using Settings, Control Panel, or Command line. Make sure to backup your data and user files first.

Click Apply.; Click OK.; Once you've completed the steps, when you get a User Account Control prompt, you'll still be able to access the desktop and other apps.

The last method you can use to delete a user account on Windows 11 is the User Accounts dialog, though this one is actually a bit hard to find unless you know specifically what you're looking for.