I specialize in customizing Windows desktops by creating a wide range of themes, cursors, icons, skins, and various other enhancements, all provided free of charge.
How to install Windows 7 Themes
Download and unpack the Big Sur Light - Windows 7 theme.rar from given media fire link and then archive it using 7zip;
If you are installing the theme for the first time: First, patch the system with the Universal Theme Patcher.
Move the *.theme files as well as the *.msstyles folder to C:\Windows\Resources\Themes.
Click in a blank area on the desktop and select "Personalize" from the context menu.
Apply the theme
SOURCE: vsthemes.org
Tip: You can watch tutorials from Youtube also .
Thank You ! Your kind words added joy to my birthday celebration. Thanks a lot mate !