Could you post a log so I can make sure it's nothing in OBS?
All I was saying is that as far as I've ever seen, webroot seems to purposely prevent capture. As far as I know webroot doesn't do this by accident, it does this by design. Why? Because from what I've seen it seems to be designed to protect you from bad applications that try to capture your system to peek at what you're doing. It's an anti-capture security measure.
I am not at all saying "turn it off". I am simply telling you what I know based upon my past experience with other users who have used webroot. It was the same thing with them. If you would prefer to keep webroot on, then by all means, keep it on. Just note that it may interfere with capturing, which is what appears to happening here.
Maybe there's an option to disable their anti-capture stuff in their settings. I would dig around in its settings to see if there is such an option anywhere, and if there is, disable the anti-capture stuff, and restart your computer, that way you can capture your screen with OBS. However, that's completely up to you. I don't quite know what to suggest otherwise.
