Please refer to this article for the most up to date minimum system requirements for using Kahua -- System Requirements

Windows 7

Kahua strongly recommends that Windows 7 users upgrade to the recommended Service Pack level specified in the Kahua System Requirements which can be found using the link above.

Kahua and the integration between Kahua and WebDAV supports TLS 1.1 and 1.2 but no longer supports Transport Layer Security (TLS) 1.0.  

Windows 7 without Service Packs does not support TLS 1.1 or higher and, therefore, Kahua's WebDAV integration will not work on Windows 7 without Service Packs.  

Microsoft provided support for TLS 1.1 and higher with the release of Windows 7 Service Pack 1, however, it requires a registry key update to activate it. 

Note: The update requires local admin rights on the computer and should only be performed by someone knowledgeable with updating the registry. It is strongly advised to make a backup of the registry prior to making any changes.

There are two ways to add the required keys to the registry: 

1. Microsoft provides an "Easy Fix" which automatically adds the required keys to the registry. The "Easy Fix" (MicrosoftEasyFix51044.msi) can be downloaded from the Microsoft website below:

Once the update has been made to the registry, a reboot of the workstation is required.

2. The required keys can also manually be added to the registry. 

The DefaultSecureProtocols registry entry will need to be added as a DWORD bitmap and the value of 0x00000A00 as follows:

Add it to the following path:  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\WinHttp

On x64-based computers, also add it to the Wow6432Node path:  HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Internet Settings\WinHttp

Once the update has been made to the registry, a reboot of the workstation is required.

Please refer to the following Microsoft support article for full instructions: