Both Win10 machines still do not show the scroll bar in Task Manager tool. The Win7 machine does show the scroll bar, so this may be a Win10 issue specifically. Both Win10 machines have the Anniversary Update installed.
Thanks for the details. We'll make sure the Anniversary Update is installed during testing and see if we can reproduce the issue. Perhaps, it wasn't installed on the test machine that was used.
During the upgrade of the Host app on the Win10 laptop, I enabled the Monitor driver during install and this somehow disabled my ability to dim the screen brightness on the laptop.
You mean you couldn't set the brightness using "hardware" buttons on the laptop? Could you tell the laptop brand/model?
I ended up removing the Host app altogether, rebooting and re-installing it, skipping the Monitor driver part, and everything finally worked fine.
Since the monitor driver was added in this very update, some issues are possible, sorry for that. We'll be testing them and fix the driver code when necessary.
Adding the driver itself was necessary for the proper work of the "blank remote screen" feature on Windows 8/10. Without that driver installed the feature won't work properly. So if you don't use that feature you don't actually have to install the driver.