After starting the computer I usually start the web browser fairly soon after start-up. Often I see the title bar flicker briefly and the colour change from
Inactive. The browser does not process mouse scroll or keyboard cursor messages. I need to click the browser for it to receive focus and start processing input again.
No other application is running (in the sense of having a button on the
Taskbar). When I run Task Manager, nothing obvious suggests itself as the culprit. Is there any 3rd party technical tool or in-built Windows application that can identify which process is capturing focus? Presumably some Windows message like
WM_SETFOCUS is involved, so perhaps there is some way to tell Windows to log any processes processing this message?