Windows 11 Context menu glowing outline

Hi, when custom right-click submenus are added through the registry, visual glitches like that usually mean the shell is rendering a menu state it was not really designed to handle.

I would first export the registry keys you changed, then remove the custom submenu entries and add them back one at a time. That should show which entry causes the outline. Also check whether the command uses a legacy shell verb, a custom icon, or an invalid/empty `MUIVerb`, because those can make menu rendering odd.

There is not really a supported setting to style or remove that glow from a custom context menu item. If this is for regular use, the most reliable fix is to simplify the registry structure or use a supported shell extension/context menu implementation rather than forcing nested menu behavior entirely through registry edits.