Windows 10: AnyConnect stopped connecting intermittently similar issue as KB4033637 update

This issue we are having looks the same as KB4033637 affecting Windows 10 1607, we are running 1909.


https://answers.microsoft.com/en-us/windows/forum/all/update-for-windows-10-version-1607-for-x64-based/8989bccb-1932-414c-a06e-eb5c9dc41f2f


Several domain machines are affected, we don't believe anything updated. This has been going on for a few weeks. The errors we see are popups when trying to connect intermittently.


We have support from Cisco and they could not find anything wrong with the AnyConnect install and when the errors did popup, the Firewall was reporting a successful connection, but Windows did not think it was.


Thanks for any insight.

:)

 

Update for Windows 10 Version 1607 for x64-based Systems (KB4033637) - causes Cisco AnyConnect Secure Mobility Client to stop working

Hi,

After the KB4033637 Windows 10 update was installed on my HP spectre, I was no longer able to connect to a VPN using Cisco AnyConnect. I keep getting the error "The VPN client driver encountered an error. Please restart your computer or device, then try
again." followed by "AnyConnect was not able to establish a connection to the specified secure gateway. Please try connecting again.".

I rolled back my system to before the Windows update, and was able to connect using AnyConnect.

Then, once again my computer reinstalled the update and I was unable to use VPN.

Is there any way to fix this problem without uninstalling the Windows update?

Thanks,

nk

***Post moved by the moderator to the appropriate forum category.***

 

Internet connection after installing Cisco AnyConnect

Hi,



Thank you for writing to Microsoft Community Forums.



We understand the difficulties, you are facing with the internet connection on the PC after installing Cisco AnyConnect. You have uninstalled Cisco AnyConnect from the PC, but you still have the connectivity issue.



In this scenario we would suggest you to perform this steps and check.

1. Press Windows + R key from the keyboard to open
   Run command.
   
2. Type inetcpl.cpl and click OK.
   
3. Select Connection tab and click on
   LAN settings.
   
4. Check the boxes beside Automatically detect settings &
   Use automatic configuration script.
   
5. Uncheck the box beside Use a Proxy server for your LAN.
   
6. Click on OK on both the windows.

If you still have the issue with the Internet connection on the PC, then we would suggest you to refer the below articles.



Fix network connection issues in Windows

Computer that has VPN software installed can't detect wireless
network after upgrading to Windows 10



Note: Normally, software programs make registry changes automatically. You should not make unnecessary changes to the registry. Changing registry files incorrectly can cause Windows to stop working
or make Windows report the wrong information.



Registry disclaimer: Important this section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry
incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs.

Load or Unload Registry Hives



We await your response.



Aditya Roy

Microsoft Community – Moderator

 

Cisco AnyConnect

Hello
Xiu RuLim,

It seems that there are some traces in the registry left even after uninstalling the program.
I suggest that you follow these steps to delete the registry keys related to Cisco AnyConnect.

Disclaimer: The steps below includes system registry modification. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection,
back up the registry before you modify it. Then, you can restore the registry if a problem occurs.

Make sure to backup registry first, please refer to this support article:
How to back up the registry in Windows. Please follow the steps below:

1. Press Windows key + R. The run dialog box will open.
2. Type regedit, then press Enter.
3. Browse to the following location: HKEY_CLASSES_ROOT\Installer\Products\
4. Within the Products folder, locate and delete the registry key which contains product information for
   Cisco AnyConnect Secure Mobility Client.
   
   ◦Each registry key within Products is an alphanumeric string. Select the first key and look on the right side for ProductName REG_SZ Cisco AnyConnect Secure Mobility Client. Go through each key in the Products folder until you find the one for Cisco AnyConnect
   Secure Mobility Client.
5. Close the registry editor.
6. Once done, try to start the installation for Cisco AnyConnect.

Hope this helps. If you would like me to provide additional advice, simply respond to this thread. I will get notified and I’ll reply to you as soon as I can.