UltraUXThemePatcher makes some minor changes to your system .DLL files in order to use 3rd party themes on your Windows 10 installation. You can get these new Windows themes at for example a custom styling site like deviantart.com.
UltraUXThemePatcher makes a backup from the original .DLL files so you don’t have to worry about anything. Changes can be undone by just uninstalling UltraUXThemePatcher in case you have any issues.
UltraUXThemePatcher is available for Windows XP to Windows 10 for 32bit and 64bit versions. Support for the newest Windows 10 21H2 is also available.
Download: UltraUXThemePatcher 4.1.3