Click on the "gear" icon (at the top right corner of Internet Explorer) select "Manage Add-ons". Look for "Yandex.Bar" and "Visual bookmarks", select these entries and click "Remove".
Click on the "gear" icon (at the top right corner of Internet Explorer) select "Manage Add-ons". Look for "Yandex.Bar" and "Visual bookmarks", select these entries and click "Remove".