Microsoft has launched the optional KB5003690 Preview cumulative upgrade for Windows 10 2004,
Windows 10 20H2 and Windows 10 21H1. This cumulative upgrade belongs to Microsoft’s June 2021 month-to-month “C” upgrade, enabling users to check the upcoming repairs set up for next month’s July 2021 Patch Tuesday.
Unlike Patch Tuesday cumulative updates, this sneak peek upgrade includes bug repairs, efficiency improvements, and enhancements to existing functions and does not consist of any security updates.
KB5003690 likewise consists of the Flash Removal Package, which will eliminate the 32-bit Flash Plugin from Windows.
Windows users can install this upgrade by entering Settings, clicking Windows Update, and picking ‘Check for Updates.’ As this is an optional upgrade, you will be triggered to click the download and set up button before Windows 10 sets up the upgrade, as revealed below.