Download the of the Kerio Control VPN Client from the official GFI/Kerio website. Newer versions include updated driver certificates compatible with modern Windows updates. 2. Force Administrative Privileges
Once Windows boots, immediately try installing the Kerio VPN Client. 5. Reset the Windows Network Stack
Contact your network administrator or Kerio/GFI support with the client log file (located in %ProgramData%\Kerio\VPN Client\logs ).
Alternative for MSI files: Open an Elevated Command Prompt (Type cmd in Windows search, right-click, select ), navigate to your download folder, and launch the file manually: msiexec /i kerio-control-vpn-client.msi Use code with caution. error 28201 kerio vpn client
Error 28201 typically occurs when the Kerio Control VPN client fails to install its virtual network driver because a previous version left behind corrupted registry keys or conflicting device profiles. support.keriocontrol.gfi.com Quick Fixes
The installer may attempt to:
This error typically occurs on , particularly after a major Windows Update or when upgrading the Kerio client version. Download the of the Kerio Control VPN Client
To avoid running into driver installation errors with Kerio Control VPN Client in the future, observe the following practices:
Error 28201. Failed to install VPN device driver. Result: E_UNEXPECTED, device is already registered.
Hold down the Shift key while clicking in the Windows Start Menu. Alternative for MSI files: Open an Elevated Command
Press or F7 to select "Disable driver signature enforcement." Install the Kerio VPN Client. Summary Checklist Clean Uninstall (KT Uninstaller) Delete registry keys ( WOW6432Node\Kerio ) Uninstall Virtual Network Adapter Reset Networking ( netsh ) Run installer as Admin
Upon reboot, press or F7 to select "Disable driver signature enforcement." Log in and attempt the Kerio VPN installation again. 4. Purge the Windows Device Manager
Upon rebooting, a menu with options will appear. Press or F7 to select Disable driver signature enforcement .
After using these official tools, the system should be free of any Kerio VPN remnants that were causing the conflict. Re-attempt the installation.
Often, a standard uninstall leaves behind corrupted files or registry entries that trigger Error 28201 during a reinstall.