Qvo6 Virus is an unwanted application that causes redirections to the websites it promotes. You may find it listed as a browser hijacker because after installing the extension your home page, default search engine and new tab page are no longer those that you set up. If you go to Internet Options and try to make your search engine google.com or Yahoo! or any other that you always used, after opening a browser you will see that none of the changes you made were saved. Browser hijackers like Qvo6 Virus are programmed to keep redirecting any inquiries to the sites they advertise.
Even though the toolbar causing redirections is not malicious itself and does not harm your computer directly, it is recommended to remove any files related to it as soon as possible. The longer you have Qvo6 Virus redirections, the higher chances are that your computer will be attached by viruses. Search results that this search engine displays are mixed with advertised links. Some of them migh be corrupted or lead to malicious websites. Qvo6 Virus developers do not take any responsibility for the content displayed. Once you click on such a link (accidently or intentionally) your computer mgiht get attacked by a virus or Trojan.
Please note that a simple uninstall of the application from Control Panel is not enough because browser hijackers like Qvo6 Virus are programmed to be difficult to remove. You should use special removal tools and try a manual deleting only if you know enough about computers not to get rid of important system files. For more information about Qvo6 Virus and its removal instructions refer here