About Shell&ServicesEngine adware
ru.leon5455.com is also known as PlyricsPlug, LyriXeeker, and LyricStart, and all these variants are available at the websites that have identical designs. No wonder it has been labeled as an adware program. There is no need to keep the application on your system as ru.leon5455.com is not useful. and then cause ads against their will. it seems that Those are the main reasons why this app is listed as a PUP (potentially unwanted program). In most of the cases, websites that ru.leon5455.com redirects make people visit are commercial, such as online shopping websites.