An anonymous reader writes: Russia's anti-monopoly regulator has ruled that Google has violated Russian antitrust laws by requiring that manufacturers pre-install its services on their devices. Stock in Russian search firm Yandex has soared since the ruling. Cnet reports: "The agency, Russia's Federal Antimonopoly Service, has 10 days to issue a full ruling. In the ruling, Russia can outline adjustments to Google's agreements with mobile device manufacturers, according to the translated statement. But while Google was found guilty of market abuses, a Russian antitrust regulator told The Wall Street Journal the Mountain View, California-based company wasn't found guilty of 'unfair competition practices.' 'We haven't yet received the ruling,' a Google spokeswoman said in an emailed statement. 'When we do, we will study it and determine our next steps.'"