Your new blue-black theme should appear under the "Installed Themes" or "Visual Styles" section. Click it to apply.
To find and install a blue-black theme from resources like Kuyhaa, you generally need to follow these steps: 1. Patch Your System Files theme-windows-7-blue-black-kuyhaa
By default, Windows 7 does not allow third-party (non-Microsoft) themes. To enable them, you must use a "Universal Theme Patcher." Your new blue-black theme should appear under the