Security News > 2022 > May > Windows 11 KB5013943 update fixes screen flickers and .NET app issues
Microsoft has released the Windows 11 KB5013943 cumulative update with security updates, improvements, and fixes for screen flickers in Safe Mode and a bug causing some NET 3.5 apps not to open.
KB5013943 is a mandatory cumulative update as it contains the May 2022 Patch Tuesday security updates for vulnerabilities discovered in previous months.
Windows 11 users can install today's update by going to Start > Settings > Windows Update and clicking on 'Check for Updates.
Windows 11 users can also manually download and install the KB5013943 preview update from the Microsoft Update Catalog.
After installing today's non-security update, Windows 11 will have its build number changed to 22000.
Microsoft fixed a known issue that would cause your screen to flicker if you start Windows 11 in Safe Mode.