Thanks for the reply - W10 V1903, but I don't think versions matter much, there are *lots* of reports of incompatibility on the web. Some report that trying a compatibility property worked for them - not sure why or how, certainly fails for me.
Are you running W10?
Yes, that is the download I have tried.
And I tried the compatibility mode - no benefit.
The other issues are using with Skype or other apps, it works fine with them, just that without their LifeCam software one cannot control zoom or focus.
As above, there are *many* people with this same complaint, and have tried all of these fixes - so I just thought that MSoft might actually reply - either saying yes, or no-just give up!