Microsoft Office 2013 window resizing issue

I'm unsure why this is happening however for some strange reason I'm having troubles with buy microsoft office 2016 product key running on Windows 10. The program lags a bit whenever I attempt to resize your window. The top program usually turns white after a few moments of inactivity and often it won't resize whatsoever. However, it is still completely responsive. I'll post some pics to show what I'm referring to.

I'm not sure if someone else is having this issue however i would appreciate it if a person might help me take action.

In this screenshot, my mouse is hovered over the the font but it shows "increase font size" that is where it would be if the program would be entirely screen. However, it will not resize to half screen despite the fact that I dragged this program to the left to snap to resize window.

Try disabling hardware acceleration. Visit File>Options>Advanced. Scroll right down to the buy windows 10 heading, and appearance "Disable hardware acceleration."