KB5009543 and KB5009566 updates are breaking VPN connections in Windows
Updates for Windows are supposed to fix problems, boost security and add new features, but all too often they cause problems of their own. This month's Patch Tuesday updates for Windows 10 and Windows 11 are no different in this regard.
Earlier this week, Microsoft released KB5009543 for Windows 10 and KB5009566 for Windows 11. Users who have installed either of these updates are reporting issues with L2TP VPN connections.
Microsoft releases KB5009566 update to fix long-standing Windows 11 issue
Microsoft has released the first cumulative patch of 2022 for Windows 11 in the form of the KB5009566 update.
The patch is a mandatory cumulative update that addresses security problems thanks to the inclusion of January 2022 Patch Tuesday fixes. These address no fewer than six zero-day vulnerabilities, and a total of 97 security issues in all. The KB5009566 update also address a long-standing issue with Windows 11 and takes the operating system up to build 22000.434.