TLS 1.2 Support in Windows
We recommend that you disable support for SSL, TLS 1.0, and TLS 1.1 in your Windows operating system. You can disable TLS 1.0 and TLS 1.1 in the Windows Registry. For more information, see Configuring Schannel protocols in the Windows Registry.
The latest version of the Cisco Secure Client Umbrella Roaming Security module uses TLS 1.2. Ensure that you have a compatible version of .NET installed with your Windows operating system. Native TLS 1.2 support requires .NET framework 4.6.2+. Prior versions of .NET require registry edits (4.x) or registry edits and manual hot fix patches (3.5).