Security News > 2021 > October > Windows 11 KB5006674 update released with compatibility fixes
Microsoft has released the Windows 11 KB5006674 cumulative update, marking it as the first update for the new operating system since it has been released to the public channel.
The KB5006674 cumulative update contains security updates, performance improvements, and bug fixes for Windows 11 21H2 since it was first released on October 5th. You can install this update by going to Start > Settings > Windows Update and clicking on 'Check for Updates.
Windows 11 users can also manually download and install the KB5006674 update from the Microsoft Update Catalog.
After installing the KB5006674 update, Windows 11 will have its build number changed to 22000.
Last week, Microsoft announced compatibility holds preventing Windows 11 upgrades on devices with these applications installed.
Microsoft fixed these compatibility issues in a security update released today.