When plugging in a ThinkPad Compact Keyboard while Visual Studio is running, you may find that the middle TrackPoint (mouse) button scroll stops working with a small delay. The scrolling will continue to work fine however, as long as you don’t open Visual Studio.
I discovered in the Windows Event Viewer, that a few errors were being thrown.
Open ‘Windows Event Viewer’.
Expand the ‘Windows Logs’ folder in the navigation pane.
Look for the error around the time the scrolling functionality stopped working.