Losing focus on Windows caused by McAfee

McAfee LifeSafe steals the active window’s focus.

I found it by immediately pressing Alt+F4 when the focus is lost and capture the event using Process Monitor.

mcuicnt.exe is the one stealing the focus.

Further Reading

1. McUICnt.exe steals the current windows focus every 3 hours. How can I stop this? | McAfee Support Community