Error 28201 - Failed to install VPN device driver. Command: UPDATE. Action: LookupDevice. Result: E_UNEXPECTED, device is already registered.
Also in Device Manager, look for any WAN Miniport adapters that show an error, and uninstall them. Reboot: Restart your computer to apply changes. Step 2: Use the Kerio VPN Recovery Tool
This error often presents as a failure to create the virtual network adapter, accompanied by messages such as E_UNEXPECTED , device is already registered , or code 0x800F020B . This article provides a comprehensive overview of why this happens and steps to resolve it. What Causes Kerio VPN Error 28201?
Error 28201 in the Kerio VPN Client is fundamentally a driver installation conflict, not a network connectivity issue. While the error message can be alarming, the solutions documented above—starting with the KT Uninstaller cleanup, proceeding through manual driver cleanup, and culminating in the driver signature enforcement workaround—resolve the problem in the vast majority of cases. The key to prevention is maintaining current software versions (post-9.2.7), performing clean uninstallations before upgrades, and always verifying that installer files are unblocked and run with administrative privileges. With this comprehensive guide, IT administrators and end users alike can confidently diagnose and resolve error 28201, restoring secure remote access to the Kerio Control environment. error 28201 kerio vpn client
Error 28201. Failed to install VPN device driver. Command: CREATE. Action: LookupDevice. Result: E_UNEXPECTED, device is already registered.
: Upgrade to version 9.2.9 by running the 9.2.9 installer. The recovery tool will resolve any residual 28201 errors that appear during the upgrade.
Navigate to the official GFI support portal and download the KT Uninstaller Utility . Run the application. Set the Product Family to Kerio Control . Error 28201 - Failed to install VPN device driver
When none of the above work, dive into the logs. Open the latest .log file (e.g., KerioVPNClient_20250115.log ) and look for lines containing 28201 .
You’ll need physical or remote console access to the server. In worst-case scenarios, restore from config backup or contact GFI/Kerio support.
Avoid running multiple conflicting corporate VPN clients (like Cisco AnyConnect or Check Point) simultaneously, as they often compete for control over the same virtual miniport slots. To help narrow down the exact cause, tell me: Result: E_UNEXPECTED, device is already registered
Click on the menu at the top and select Show hidden devices . Expand the Network adapters section.
Kerio relies on WMI to register the adapter. If the WMI repository is corrupted, Error 28201 will trigger. Command Prompt as an administrator. net stop winmgmt and press Enter (confirm with if prompted). Open File Explorer and go to C:\Windows\System32\wbem Rename the folder Repository Repository.old Back in the Command Prompt, type net start winmgmt and press Enter. Restart your PC and try the Kerio installation again. 5. Check for Driver Signature Requirements
address a failure in the installation or initialization of the Kerio Virtual Network Adapter
Open the (regedit) and delete the following key (back up your registry first): HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Kerio . Reboot your PC before attempting the installation again. Alternative: Windows Native VPN