Connect Tech uses SHA-2 for signing Windows drivers. Windows 7 and Windows Server 2008 by default do not have support for SHA-2 signed drivers. If when installing a Connect Tech driver you receive errors please ensure you have Microsoft Security Update KB3033929 installed.
Prior to installing the security update, uninstall the Connect Tech driver via the device manager. After the update, the driver can be re-installed.
The security update can be found here: https://www.microsoft.com/en-us/download/details.aspx?id=46148
Further info on this security update can be found here:
https://technet.microsoft.com/en-us/library/security/3033929