What is causing my windows to be resized ?

This seems to only happen on my WIN 10 Pro system (Its only 2 months old). I have never seen this happen on my WIN 10 Home system. It seems to occur when I have a sized window and I minimize it. After a period of time not using that window, it gets re-sized ! I've been looking for an answer for the last 2 months, but have not found a solution.

Here is a B4 & After pic of my desktop of Windows File Explorer. Anybody have any Idea's what setting needs to be fixed ?

That's strange! Try running sfc /scannow from an admin command prompt. Is there anything in the error log which gives any clues? You could also try updating to the latest graphics driver.

Well no joy here ! Checked the explorer window after 1 hr, is was fine. Checked at 2hrs, it got minimized into that small window in my initial post. So drivers are not the problem.

I don't think it should be an issue, but have you looked at the following parameter (translated from French):
PC Settings –> System –> Mutitasking –> Automatically arrange windows by moving them to the screen corners or borders.

It is an option that I always leave unchecked because I despise this automatic rearranging. But I wonder if the option is checked and your window is almost in the corner, could slight jerks rearrange it and therefore resize it?

mgagnonlv said:

I don't think it should be an issue, but have you looked at the following parameter (translated from French):
PC Settings –> System –> Mutitasking –> Automatically arrange windows by moving them to the screen corners or borders.

It is an option that I always leave unchecked because I despise this automatic rearranging. But I wonder if the option is checked and your window is almost in the corner, could slight jerks rearrange it and therefore resize it?

Good point, just checked and it is set to OFF.

Well 2 weeks and still no further suggestions. But I did a test where I left several windows open on the desktop (I did not minimize them). I came back after 2 hours, the screen saver was activated and when I move the cursor, the desktop came back and the 2 windows that were just left open were now crunched on top of each other in the upper left of the desktop.

I tried the same procedure on my laptop (Which I have never seen this problem) and all windows remained the same after 2 hours.

The laptop is a HOME 64k version vs the Pro version. I matched and checked each setting between the 2 systems and they are the same with the exception of the extra ones that are available in the Pro version.

Some body else has to also have this problem.

iv seen this issue when the screens go to sleep (powersave) and the system loses connection with the screen itself and then moves windows around to either monitors that it still sees or to the base screen size of 800 x 600 i think, not sure if related but it might be a place to start looking.
the screens being scrunched smaller makes me think the base screen size thing as it has to make the windows small enough to fit on the tiny screen and then when it wakes up and sees the larger screen it leaves the windows in smaller form .
why?
good question but thats where id start...
good luck and i hope it helps.

I agree with @vagrant tech; that is most likely what is happening. So check larger monitor power saving settings.