Hello imfiringmylaser12,
It is still possible to use OpenVPN Connect v3 on Windows 7. But it must have the required updates for SHA256 certificate driver signing and verification. In the past it used to be only SHA1, but now due to requirements from Microsoft any new drivers must be signed with SHA256, which we do. And Windows 7 originally did not support that. But with the necessary updates, it should support it, and the driver should install normally.
This document from Microsoft has more information on this:
https://docs.microsoft.com/en-us/security-updates/SecurityAdvisories/2015/3033929
There have been some issues reported with this change in Windows 7 and further patches along the same lines were released. But in the end what it boils down to is that your system apparently doesn't know how to verify this driver because it doesn't know how to verify SHA256 driver signing certificates. Installing the necessary updates should solve that.
Aside from this I want to point out that Windows 7 mainstream support ended on January 13, 2015. Extended support ended on January 14, 2020.
Kind regards,
Johan
