Microsoft has released security patch updates for more than 50 vulnerabilities. 11 of which are rated critical and 39 as important in severity. The most critical bug is a remote code execution flaw in Windows Domain Name System (DNS) DNSAPI.dll, affecting all versions of Windows starting from 7 to 10. Microsoft has also addressed an important vulnerability in its Cortana Smart Assistant that could allow anyone to unlock your Windows computer. For installing security updates, simply head on to Settings Update & security Windows Update Check for updates.
Source: https://thehackernews.com/2018/06/microsoft-june-security-patch.html