Microsoft's working on it. As a short-term fix, Microsoft says
you can uninstall the update.
If you've recently noticed that games are not performing as well
as they once were, and neither is your mouse, it might not be
just in your head. Microsoft confirmed there is an issue with a
Windows update that is causing some wonky behavior.
Following the roll out of the February cumulative update for
Windows 10 Version 1809 (KB4482887), some users complained of
newfound performance issues, both in games and the way their
mice were behaving.