How can I get rid of Startzentrale.de Virus?

[Gibsony]

Hello everybody. I have a question about my computer. Wenn I open my browser (Firefox), appears the page with startzentrale.de search instead of Google. I tried to delete it from my browser as it shown by http://linkmailer.de/viren/startzentrale but it does not funktion. I made a reset of my Firefox. May be it is a virus? I do not know how to delete it now. May be you know some good antivirus tools? Thank you for your help

[ZonedOutSpace]

Hello everybody. I have a question about my computer. Wenn I open my browser (Firefox), appears the page with startzentrale.de search instead of Google. I tried to delete it from my browser as it shown by http://linkmailer.de/viren/startzentrale but it does not funktion. I made a reset of my Firefox. May be it is a virus? I do not know how to delete it now. May be you know some good antivirus tools? Thank you for your help

Try https://www.malwarebytes.org/