If you have ever been frustrated like me when trying to watch a tutorial and model at the same time and you move your mouse between blender and the Tutorial video you will often find yourself trtying to model but clicking keys on your keyboard or mouse that messes with your video.
In Windows 10 there is an Ease of Access feature that lets your mouse activate a window once it crosses the window border. Problem solved!
There is a guy on Youtube who has a very short instructional on how to activate this since Windows worst feature is that there are 10 menus for anything you want to do and none of them seem to sync together or have similar options Lol.
Sometimes we suffer in silence because we just don't know any better. I had an epiphany one day and noticed this. Then it only took 5 minutes t solve this problem. I believe I remember my MacOS had this on already so it wasn't really a blener/window problem for me until I switched to windows 10. Then I just had to notice it haha.