Microsoft has announced that starting April 2023, optional cumulative updates for Windows will be released on the fourth week of each month. Typically, these updates are used to test non-security fixes, which are then distributed as part of the patch day program.
“Starting in April 2023, we plan to release optional preview versions of non-security updates on the fourth week of the month. We have concluded that this is the best time to release and use these updates. It will be two weeks after the last monthly security update, and there will be approximately two weeks left before these features become part of the next mandatory cumulative update.”— said the representative of Microsoft.
In corporate environments, optional cumulative updates are used to provide early warning of potential issues that may arise when deploying updates released as part of the Patch Tuesday program. They also reduce the time required to test the stability of released Windows platform updates. The new release schedule for optional pre-updates replaces versions C and D, which were previously released on the third and fourth weeks of the month.