If the update hasn’t fixed the problem, try to reinstall WAN miniport virtual adapters in the Device Manager. You can download and install this update manually or using Windows Update/ WSUS. This issue is confirmed by Microsoft and was fixed in Windupdate - KB4522355 ( ). When you initialize such VPN connection, the RASMAN (Remote Access Connections Manager) stops, and the event with the Even ID 1000 and the following message appears in the Application Event Log: “Faulting application name: svchost.exe_RasMan…”, “Faulting module name: rasmans.dll”, and “Exception code: 0xc0000005”. Always On VPN RasMan Error in Windows 10Īnother problem occurs with the Always on VPN (AOVPN) connection to a corporate network.
Another VPN connection on the same computer using PPTP protocol and MS-CHAP v2 authentication works fine. It is interesting that the problem appears only with L2TP connections (even if the AssumeUDPEncapsulationContextOnSendRule = 2 registry parameter is configured). To connect automatically, you can specify the name of your VPN connections in the shortcut settings as follows: C:\WINDOWS\system32\rasphone.exe -d "VPN Name" (you can get the VPN connection name from the Control Panel -> Network Adapters and put quotes around it if it contains spaces). To make it more convenient for your users, you may place the rasphone.exe shortcut on the desktop. The VPN tunnel must be successfully established.Then a standard dialog to enter user credentials for the VPN connection appears.Select your VPN connection and click the “ Connect” button.Start the tool: Win+R -> C:\Windows\System32\rasphone.exe.The rasphone.exe tool should be familiar to anyone who has used a dial-up connection in Windows (it’s still present in modern Windows 10 versions). Try to use the good old rasphone.exe tool to establish a VPN connection. As a result, the VPN connection cannot be established. It seems that on some reason a prompt to enter user credentials is blocked in Windows 10 VPN connection dialog. Windows 10 VPN never Prompts for Username/Password
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