Microsoft fixes VPN failures caused by Windows April updates

Today, Microsoft fixed a known issue that interrupted VPN connections on both client and server platforms after installing Windows April 2024 Security Updates.

“Windows devices may experience VPN connection failures after installing the April 2024 Security Update or the April 2024 Non-Security Preview Update,” Redmond explains on the board. Windows health edge.

The list of affected Windows versions includes Windows 11, Windows 10, and Windows Server 2008 and later.

Although Microsoft did not provide the root cause of these VPN failures, it advised home users to use the Windows Get Help app and small and large businesses to contact through the dedicated “Support for Business” portal. they need assistance.

Two weeks after first acknowledging it, Microsoft fixed this known issue in Windows Cumulative Updates released on May 2024 Patch Tuesday.

The full list of affected Windows versions and cumulative updates that fix VPN failures includes:

Administrators who cannot immediately install this month’s Patch Tuesday updates can temporarily resolve VPN issues by removing the problematic April cumulative updates.

“To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name using this command: DISM /online /get-packages“, says Microsoft.

However, since Redmond includes all security fixes in a single update, uninstalling the April updates will also remove all fixes for the fixed security vulnerabilities, even if it fixes Windows VPN issues.

A year ago, Microsoft acknowledged major L2TP/IPsec VPN speed issues on Wi-Fi connections after installing the April 2023 non-security updates on Windows 11 systems.

In January 2022, it released emergency updates to resolve L2TP VPN issues when connecting through the Windows VPN client after installing the January 2022 Patch Tuesday updates.

Today, Microsoft also fixed a known issue causing domain controller reboots and NTLM authentication failures after installing last month’s Windows Server security updates, as well as a zero-day bug actively exploited to deliver QakBot and other malware to unpatched Windows systems.