Why is this happening?

[Elvis Fuentes]

I just realize that Mu pointer starts to make this effect of charging this happens when...
-I stop using the computer about 1-2 min and when I move the pointer (mouse) starts loading.
-When I'm watching videos on YouTube and I maximized to watch the video and again when I move the mouse suddenly start loading, and in some other cases like in the desktop or when I'm moving to other webpages. Can somebody tell what is going on? I know this happen when something is running in background some app or something, but I can't still figure it out.

I don't know if I wrote everything Like I should write it, I'm ESL 3 college student
Thank you.
-Elvis Fuentes

 

[vesp3r]

Well, what comes in my mind is either AV or windows updates.
Usually your AV would be set to scan/update when computer is idle
Does your computer lights start flashing rapidly as if its trying to load something?
Open up task manager to see if any process is starting after you stop using pc for 3-4 min