I believe I can help, as I had this problem when doing walkthroughs prior to finding a video cap program (when I wrote WTs by hand and typed them up)
Anyways, go to the game's launch icon and right-click and select properties. In the COMPATIBILITY tab, in the middle, there's a section titled SETTINGS, check the bottom three checkboxes (they are titled: Disable Visual Themes, Disable Desktop Composition, and Disable Display Scaling On High DPI Settings)
Then click the Apply button then the OK button, then you should be good to go. The attached photo is what the Settings should look like when you're done.