Just before, I needed to load animation for the first time. It'll be all right in a minute. If you can't solve the problem, I suggest you download the patch again.

Solution:

It's not the computer fault, but the refresh rate of the new monitor is relatively high. Legend has it that it is an old game more than ten years ago. The frame number of the game itself is low and it can't keep up with your monitor. Check the monitor settings and set the refresh rate below 60.