Go to the Settings menu of the device, select Applications→Manage applications. In the Third-party tab tap Dr.Web for Android. In the subsequent application information window tap Remove. To permanently delete the anti-virus, tap OK in the removal confirmation dialogue.
Another way to remove your anti-virus — tap the anti-virus icon on your device’s screen, and hold it for a few seconds. At the top of the display, you will see the Recycle Bin icon accompanied by the text Remove. Drag the application icon to the Recycle Bin, and confirm that you want to remove your anti-virus.