OpenVPN Support Forum

Dear all,

As the title says, I have been trying unsuccessfully to run OpenVPN on a Windows 7 64-bit system with the error message in the log that there are no adapters on the system; the same also happens after I install tap-windows-9.21.2.exe additionally. In Device Manager, the adapters appear with yellow triangular signs with exclamation marks, and an error message in Properties saying:

Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52)

(Seemingly, it is a signature verification problem). Could anyone suggest a way to address this, or, should additional information be needed, let me know what?

Thanks.

When you install please make sure to use "Run as administrator" when you run the installer.

Also, does windows not offer you the choice to continue at your own risk ?

Thanks for replying; I did run as administrator both installers.

And no, I don't think such a choice was offered - the system seems to simply block access to the drivers/adapters.

Edit: Also, I have added both installers to the trusted applications in my antivirus, so I don't expect the problem to be caused by that either.

I have not had any problem with Win7 installation of the TAP adapter.

Perhaps your anti-virus is being a little paranoid ..

Something here may help:
https://community.openvpn.net/openvpn/w ... iver-fails

Again, as far as I am able to tell, it shouldn't be the antivirus, since I have added both installers, as well as the bat files etc to the trusted applications.

Something I am thinking about is the following - I tried to install Viscosity first; during the first install, I was asked whether I wanted to "install this device software" (as in the screenshot here: https://www.sparklabs.com/support/kb/ar ... s-windows/, under "Adapter Creation Failed or Adapters appearing as Unknown Devices"), and said no. Then, with Viscosity not connecting, I reinstalled it, once with an already existing installation, and then, this not working, first uninstalling and then installing again - however, I wasn't prompted to install the software again. Then, since it still couldn't connect, I moved to OpenVPN directly, but it still fails to connect - could the problem be a registry key that was edited the very first time I was installing, and has stayed like this since?

The link in the post immediately above mentions a RunOnce key, but it says it is for Windows 2000/XP; I have checked the registry, and such a key exists - however, it is there, not missing. Not sure how to proceed...