15.1.8. Printix Client icon does not appear

The Printix Client icon does not appear. The PrintixClient- user . number .log file includes the following message:

System.NotSupportedException: The requested security protocol is not supported.
  at System.Net.ServicePointManager.ValidateSecurityProtocol(SecurityProtocolType value)
  at WindowsUI.PixWindowsClient.StartGUIWorkers()
  at WindowsUI.Program.Main(String[] args)

RESOLUTION: Enable TLS 1.2.

TLS 1.2 is enabled by default if .NET Framework 4.6 or later is installed on the computer.

1. Select Windows logo key + R to open Run.
2. Type: regedit, and select OK.
3. In Registry Editor browse to:
   HKEY_LOCAL_MACHINE\SYSTEM\
   CurrentControlSet\Control\
   SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client
4. Add the DWORD value name DisabledByDefault with a value of 0.
5. Restart the computer.