Microsoft has made Windows 10 version 21H1 generally available and begun its phased roll out via Windows Update. It outlined this update, also known as the May 2021 Update, back in February. The update is said to be largely crafted in response to needs expressed by customers during pandemic lockdown months, and since it can be summed up in three official bullet points, I've repeated them below. Windows Hello multicamera support to set the default as the external camera when both external and internal Windows Hello cameras are present. Windows Defender Application Guard performance improvements including optimizing document opening scenario times. Windows Management Instrumentation (WMI) Group Policy Service (GPSVC) updating performance improvement to support remote work scenarios.