Microsoft has released Windows 11 KB512103 and KB5120240 cumulative updates for versions 25H2/24H2 and 23H2 to fix security vulnerabilities, bugs, and add new features.
Today's updates are mandatory as they contain the August 2026 Patch Tuesday security patches for 400 vulnerabilities discovered in previous months.
You can install today's update by going to Start > Settings > Windows Update and clicking on 'Check for Updates.'
You can also manually download and install the update from the Microsoft Update Catalog.
This is the eighth 'Patch Tuesday' release in 2026, and it's based on 24H2, which means 25H2 gets the same update. There are no exclusive or special changes. You'll get the same fixes across the two versions of Windows 11.
