Kaspersky Lab has filed an anti-trust complaint against Microsoft with the European Commission.
The Russian cyber security firm has accused the American firm of abusing its market dominance by distributing its own anti-virus software with its operating system.
A Microsoft spokesperson told New Statesman Tech the company was confident that Windows 10’s security features complied with competition laws and that its primary objective is to keep customers protected.
But Kaspersky said that Microsoft’s actions had led to “a lower level of protection for users, a limitation on their right to choose, and financial losses both for users and security solution manufacturers”.
Kaspersky first threatened to complain to the European Commission in November, but in April said it would stall after Microsoft agreed to make changes. A Microsoft spokesperson told Reuters it had since “taken a number of steps” to address Kaspersky’s concerns.
In an email statement sent to New Statesman Tech, a Microsoft spokesperson added that the firm would answer any questions the regulators had.