Your new blue-black theme should appear under the "Installed Themes" or "Visual Styles" section. Click it to apply.
If you are trying to make a newer version of Windows look like this, you might need additional software like WindowBlinds to support legacy Windows 7 styles. 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
: Look for UltraUXThemePatcher or similar tools often bundled with Kuyhaa downloads. theme-windows-7-blue-black-kuyhaa