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Earlier today, Microsoft released important out-of-band (OOB) optional updates to fix several issues. These include VPN connectivity problems that were introduced with the recent Patch Tuesday updates for Windows 10 as well as Windows 11. Since it is a cumulative update, you won"t need to install other previous updates. You can navigate to it via Settings > Windows Update & Security or opt for a standalone download via the Microsoft Update catalog.
Here"s how Microsoft describes the VPN issue:
After installing KB5009566, IP Security (IPSEC) connections which contain a Vendor ID might fail. VPN connections using Layer 2 Tunneling Protocol (L2TP) or IP security Internet Key Exchange (IPSEC IKE) might also be affected.
Alongside VPN connectivity problems, the new updates also fix Windows Server domain controller restarting problems, Virtual Machines start failure inside Hyper-V issue, and Resilient File System (ReFS)-formatted removable media mount failure bug. This is something we covered in detail prior to the fix here.
The following updates given alongside the respective Windows versions are meant to address these issues.
Windows 11, version 21H1 (original release): KB5010795
Windows Server 2022: KB5010796
Windows 10, version 21H2: KB5010793
Windows 10, version 21H1: KB5010793
Windows 10, version 20H2, Windows Server, version 20H2: KB5010793
Windows 10, version 20H1, Windows Server, version 20H1: KB5010793
Windows 10, version 1909, Windows Server, version 1909: KB5010792
Windows 10, version 1607, Windows Server 2016: KB5010790
Windows 10, version 1507: KB5010789
Windows 7 SP1: KB5010798
Windows Server 2008 SP2: KB5010799
You may find more details in the original announcement post.