Start the Kerio installer but when the welcome screen appears.
This solution applies specifically when the error is caused by driver signature verification failure, particularly on Windows 8, 8.1, and some versions of Windows 10 with older Kerio VPN Client releases.
If using an .msi file that lacks a "Run as administrator" context menu choice, open and launch the installer via the command line: msiexec /i "C:\path_to_file\kerio-control-vpn-client.msi" Use code with caution. 3. Temporarily Disable Antivirus and Driver Enforcement error 28201 kerio vpn client
, you aren’t alone. This specific error typically occurs during the installation or initialization of the Kerio VPN Client, often leaving users stuck with a failed setup. In most cases, Error 28201 is tied to the Kerio Virtual Network Adapter
temporarily to prevent it from blocking driver injection. Right-click the tool and select Run as Administrator . Start the Kerio installer but when the welcome
Kerio VPN client is failing to install with Unspecified error 0x80070103
Contact your ISP or network admin to whitelist TCP and UDP 4090 (or whatever custom port your admin set). In most cases, Error 28201 is tied to
Yes, it can, but it is less common. The most frequent cause on Windows 11 is related to driver signature conflicts from older VPN clients. The recommended solution is to use , which contains properly signed drivers.
: Download the KT Uninstaller utility from the official GFI support repository.
Windows often blocks the installation of low-level network drivers if the installer lacks sufficient permissions. Locate your Kerio VPN Client Right-click the file and select Run as administrator 3. Disable Third-Party Antivirus/Firewalls