Russian antivirus maker Kaspersky Lab has filed official complaints at regulatory bodies in various countries across the EU and in Russia, asking authorities to force Microsoft to cease its efforts to sabotage third-party antivirus products in the detriment of its own security solution, Windows Defender. Microsoft has been using shady tactics to push users towards Windows Defender, its latest endeavor, with the migration to Windows 10. Microsoft also buries information about third party AV license expiration warnings inside the Windows Security Center, instead of allowing AV vendors to show a popup or notification area alert.
Source: https://www.bleepingcomputer.com/news/security/kaskpersky-complains-to-russian-and-eu-authorities-about-microsofts-monopolistic-tactics/