Yeah, but is there a way you can tell?

Unless you have access to Admin and can see ALL processes running, then no. Well, I guess you could try and analyze all data leaving your computer... but is it worth it? If you're working from home, just use a different computer for non-work stuffs.

In my experience, there is no way you can tell -- even if you are an Admin -- not unless you are highly skilled and technically competent and possess detailed knowledge and understanding of computer and program behavior.

OK, but many folks have a fair amount of control over their work PC's. For instance, they can install software manage services, etc.

This "surveillance-ware", I am suggesting, can be thought of as a kind-of malware and be detectable in some way, either on the disk or as a running process.

I am surprised that no one has created something to check if such surveillance software is running or perhaps even actively screenshotting.

Did the device come from corporate? If yes, then you know :)

wireshark