https://www.bleepingcomputer.com/news/microsoft/windows-10-kb5009596-update-released-with-bug-fixes-improvements/ > Microsoft has released the optional KB5009596 Preview cumulative update for Windows 10 20H2, Windows 10 21H1, and Windows 10 21H2. > This update includes fixes for reboots on domain controllers, L2TP VPN connection issues, and 25 other fixes or improvements.