I feel unsafe. I am not sure whether it was me who installed Quickstart.ninja virus or is it someone controlling my computer at the moment. The problem is, settings of my browsers were modified without my knowledge – someone changed homepage settings and made Quickstart.ninja page to appear each time when I open my browser. I guess it was set like a default page, however, I don’t want to use it! Even the name of it looks ridiculous. Can you help?