Last updated: 2025. Compatible with Kerio Control 9.x and 10.x.
Press Windows Key + R , type devmgmt.msc , and press to open the Device Manager . Expand the Network adapters section.
This is the recommended first step for "device already registered" errors.
Download the utility from the GFI Support Portal . error 28201 kerio vpn client
. It usually means the installer failed to register the driver or that a previous version of the driver is gunking up the works. Here is how to resolve the issue and get back online. 1. Run as Administrator
How to Fix Kerio VPN Client Error 28201: A Complete Guide If you are trying to install or upgrade the Kerio VPN client on Windows 8, 10, or 11 and keep hitting , you are not alone. This error often occurs because of leftover registry keys, conflicts with existing virtual adapters, or Windows' strict requirements for signed drivers.
After successfully installing the Kerio VPN Client: Last updated: 2025
: Ensure you have a stable internet connection. Try connecting to the VPN from a different network to rule out local network issues.
GFI provides a specific recovery tool for "0x800F020B" or "unspecified" errors associated with 28201. Download the .
Restart your computer before attempting a fresh installation. Expand the Network adapters section
:
Always download the latest version of the Kerio VPN Client from the official GFI/Kerio website. Newer versions are optimized for modern Windows updates and security protocols.
The Kerio installer needs deep system access to create a virtual network adapter. If you are running the
Last updated: 2025. Compatible with Kerio Control 9.x and 10.x.
Press Windows Key + R , type devmgmt.msc , and press to open the Device Manager . Expand the Network adapters section.
This is the recommended first step for "device already registered" errors.
Download the utility from the GFI Support Portal .
. It usually means the installer failed to register the driver or that a previous version of the driver is gunking up the works. Here is how to resolve the issue and get back online. 1. Run as Administrator
How to Fix Kerio VPN Client Error 28201: A Complete Guide If you are trying to install or upgrade the Kerio VPN client on Windows 8, 10, or 11 and keep hitting , you are not alone. This error often occurs because of leftover registry keys, conflicts with existing virtual adapters, or Windows' strict requirements for signed drivers.
After successfully installing the Kerio VPN Client:
: Ensure you have a stable internet connection. Try connecting to the VPN from a different network to rule out local network issues.
GFI provides a specific recovery tool for "0x800F020B" or "unspecified" errors associated with 28201. Download the .
Restart your computer before attempting a fresh installation.
:
Always download the latest version of the Kerio VPN Client from the official GFI/Kerio website. Newer versions are optimized for modern Windows updates and security protocols.
The Kerio installer needs deep system access to create a virtual network adapter. If you are running the
